ECA grounds, help needed

[Cruisers]

The factory information shows the ECA to have 2 engine grounds, # 20 & 40. Can anyone tell me exactly where these grounds attach to the engine?

 

[Uncle Gump]

I believe one is a sheet metal ground... in the RH cowl area. Might even be RH kick panel inside near the ECM. My EVTM says the other is with the battery ground cable at the starter... but I think it's on the rear of the cylinder head.