E34 Angel Eye Headlights

[nickrout]

Very excited, just taken delivery of my new Angel Eye Headlights for my E34.

Now the tricky bit.... fitting them! They did have an instruction sheet, which is clear enough but I have a V8 with the battery under the back seats. The simple loom they sent only stretches as far as the engine bay. So I have a +ve terminal next to the expansion tank in the engine bay, any clue as to where (if anywhere) I can attach a negative wire to good affect?

Any input welcome, thanks Nick