Engine block grounds

On the passenger side down by the motor mount there is a ground strap that goes from the body to the block.
 
Shield grounds

Got out wiring schematic that I got off site, but it's for an '89.
Wiring for all shields go the case is what the drawing is showing.
Do you know where the shield grounds, ground. This will help keep me from ripping harnesses apart?

Sorry to keep bugging you guy's, but I'm really lost without a good set of wiring schematics. Plus being an EX GM tech. don't help matters.
 
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