Where could I find a wiring diagram for a 1976 VW super beetle?

Where could I find a wiring diagram for a 1976 VW super beetle?

Either in the Bently repair manual (the orange one):

http://www2.cip1.com/SearchResults.asp?Search=Bently&Search1=Search

If you are keeping the car it is well worth the money.

Or one of the VW Bug forums like:

http://www.thesamba.com/vw/

And search for "1976 Super wiring diagram".