Where are all the ground straps (and cables) on a 1966 c10 suburban?

The suburban is not original, it is a rusted out old work truck. "Random bunch of parts" would be a better description. It starts, runs, and charges, so there is no immediate pressure to fix something. I just thought it would be a good idea to clean and repair all the grounds, and replace any missing ones while it is all apart.

I have looked all over the web, and there seems to be no consensus on how Chevrolet did it. Also, I am hearing that it was different when you had a radio. Either version would do. I see no evidence that it ever had a Chevrolet radio (just a lot of badly installed aftermarket stuff). I suppose I will probably add the radio grounds if they are different.

I have no idea if this was a 6 or a v8 when it was built, It is a v8 now.