Nice detailed video on the wiring. If I remember correctly I used the oil pressure wire for the oil temp sender.
Also I think I used the unlabeled red wire with an inline fuse for power to the heater switch.
Don't forget to trim the body roll/lip at the dash area. Since you're spacing the dash back some it'll probably definitely need trimmed. I'd hate to see you tear the vinyl up putting the body back on.
I thought the haywire kit was really nice. The instructions were simple but informative enough, everything was labeled nice, properly sized wires and plenty of length on everything.
You also might have a little trouble getting the VW turn signal to fit with the steering wheel since you're spacing the dash out.