I've just found out it's for the air conditioning, but I don't have it anymore so it's redundant!

Eddited. Thank you.

Hi guys. I've just got the 2002 Disco 2 TD5 body back on the chassis after months of welding the chassis and replacing parts in my spare time. At the front of the body coming from behind the OS headlight there is a wiring harness that I've...