It should go from the back of the alternator across to the loom which sits on top of the chassis' then it runs back and up behind the brake servo somewhere and then across the front of the bulkhead panel to the battery, that's how mine was routed from factory, its were its jointed where it joins the loom on top of the chassis leg that mine had gone crusty, I just cut mine at that point and at the battery end then run new.