[VetteVet]

Here is the engine bay wiring with the fender junction on the top.
Doc is right about the wiper wiring on the diagram but your harness
is most likely OK.



The fusible link is rated at 16 gauge 30 amp.
The lower red wire in your pic is the battery charging wire from the alternator, regulator, cab, junction, and it is 12 gauge.
If you have the gauge dash, you will have the small 18 gauge black wire for the battery charge indicator with the funny shaped fuse holder. If you have the light warning dash you will not have that wire and fuse holder.