evening guys really need some help please

Right to start with i thought id give it to a friend that auto electrician works on boats electronics etc,

so i gave him a loom a friend had that bought few years ago for a converted mk1 g60,

gave him my rado loom and my 83 tintop gti loom to cut and use,

when i got it back he said this,

they wernt the same ( my guess was my friends was a golf g60 not a rado loom) what was the difference?

also he cut two wires out for the lambda sensor as other one didnt have one but when i took the lambda off the rado it had a plug with 4 pins but only a BROWN(ground) and RED/WHITE connected to it so not sure where that goes to so here i go for the the wires i have left that i need help with:

RED/YELLOW from fuel rail (does this go to a relay? poss fuel pump?)

RED/WHITE from lambda sensor (where does this go to?)

BLACK/YELLOW from PIN15 on rado loom (is this mains 12v or switched)

YELLOW think from middle pin on knock sensor (is this as above mains or switched?)
the above have been tapped together (does this give a clue?)

think i have this bit,
BROWN relay pin 86 plus GROUND
BLACK/YELLOW relay pin 85 from loom?
RED/YELLOW relay pin 87 from mk1 block(that'll just plug in but whats it for)
BLUE/BLACK relay pin 30 from rado loom pin 15 but whats it for?)


also on the coil i have a white double plug GREEN and BROWN which side does this go to and are they right,
also tapped with these i have a single black plug which side does this go to?

i know this is a nightmare and wish i lived on mainland i cold buy a pint for anybody that can help me.

please please help its nearly finished

thank you

ryan