Fuel pump wire

I've got a fault somewhere in the live feed from the fusebox to the fuel pump. I've located this as a red/yellow wire that runs from the fuel pump the back of the fuel tank underneath the seat and onto the loom that runs to the rear of the car. Looking fom underneath the car, the wire (in heat shrink tube) appears trapped by the fuel tank against the chassis . Maybe this has caused a break in the wire?

From studying the wiring diagrams this wire appears to meet at a connector with two red/white wires (warm up reg and aux air valve). These three wires then connect to a black/green wire which enters at multipin connector A pin 8.

Can anyone answer me how do I identify multipin connector A pin 8? Does anyone know where the connector is (behind the fusebox)? Anyone had to replace this wire before - any tips? The fusebox (below) is a contintental fuse type.



This is my first foray into wiring so want to make sure I've got everything covered.

Cheers

I think it is one of the centre two plugs and the pin is in the middle of the plug too…

Probably not much help to you though… ops:

This pin was empty on my car (due to it not being a Gti).
The feed to the pin however was live, so, I had to add a wire into it to take off to the pump. ended up giving me loads of trouble so I completely re-wired the pump onto a stand alone relay fed directly from the battery.

The plug letter is labelled next to the socket on the fusebox.  Each connector is numbered if you pull the plug.

Cheers, all seems very simple all of a sudden . Found block A, connection 8 and it looks like this - its the burnt hole 8O



Assume must be water which caused the problem. I felt around the carpets - all very dry - although have found a damp patch in the foot well, no water though. Connecter block D also has similar damage in it very near to where the blower connection is - might explain why my blower is not working?

Suppose could be possible damage has happened in the past (did have a leaky front screen seal about 1-2 years ago) and has only become marginal and failed the other day?