Correct earth locations

I have a thick earth cable from top bolt holding coil and small earth from the cable that also feeds oil pressure sender….. Both were connected to far right bolt of rocker cover, surly this isn't correct…. is it?

Yes it could be.  Usually there is one from the Valve cover to the coil, but also the oil pressure sensor is on the side of the hood and grounded via the screw threads of the sender.

The far right of the Valve cover is a place that VW used alot for Various groundings of the Cabriolets over the years that I have seen, as the 90's used it to also hold the Bracket for the Lambda (O2) sender.

Some grounds aren't needed that much, as in the Bonding (ground evening) for the Fenders and the bonnet, and I have seen them on the "A" pillar to the Door Frame.  (These bonding wires are to Tie the panels to a common point that in the oldie days would stop Spurious Impulses from interfering with the Super-Hetrodyne-Receiver [read AM radio]).  When the HV leads and spark plugs could overdrive the final amplifiers and you would hear engine revs motorboat your radio.

With the advent of folks switching over to 8-tracks, and Cassettes over radios these weren't as needed, that and the fact that Resistor wires and plugs tended to quash that, and that Radios were not as cheaply made with less filtering of the final amp circuits.

Yes been around radios/electrics since the middle 60's.

Ok well the cable is cr P and needs replacing, what gauge cable is recommended?

Well the main cables can be replaced by 2 off the shelf ones from a good parts store. One Battery to frame and one Battery to battery flat jumper.

Battery to frame is @ 16inches and the frame to engine/tranny is about 0ne foot to 2 feet depending on how it mounts.

Diesel/digifant/carbed are easier to change than the CIS which is better done from underneath as the CIS is directly above the frame horn mount.

https://www.werk34.de/en/negative-cable-battery-to-body.html

Shows what the replacement ones look like.

This is the one I need just seemed bit steep £20. But is what it is ain't it! Good old golf owner ship 😂

£20 for a earth cable.. are they having a laugh?

Lots on eBay, VW did not make special cables just for there cars…

Just check the length cable you need or take the old one off and visit a motor factors to see what they have in stock…

https://www.ebay.co.uk/itm/KIT-CAR-CLASSIC-braided-engine-earth-strap-350mm-82-amps-FLAT-profile/302237842284?hash=item465ec77b6c:g:cXwAAOSwbWJcQF5h

https://www.ebay.co.uk/itm/12-Classic-Car-Earth-Strap-Battery-Lead-Cable-Flexible-Tinned-Copper-Braid/121911839846?hash=item1c62830c66:g:EQwAAOSwv-NWaFQw

https://www.ebay.co.uk/itm/12-INCH-300mm-CAR-BATTERY-BLACK-EARTH-EARTHING-NEGATIVE-LEAD-CABLE-WIRE-STRAP/232235458587?epid=2227958004&hash=item36124fe01b:g:9W0AAOSwiqFaT5kp

Yea that's what I thought, seen these but they come in three thicknesses but ain't got a clue which one I need! I know it's 360mm length 

16mm2 25mm2 or 35mm2

https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F161828875442

You can go to a good Electric Supplier and probably get one locally.

They use them to bond Electrical cabinets, Computer Racks, you name it.  

Radio shack used to sell it, you tinned the ends Drilled your own holes and then placed it in vinyl sheathing or heat shrink.

A few on here:

https://www.autoelectricsupplies.co.uk/product/154/category/31

ta, ordered