"You lost me already. I'm even new to using a volt meter properly.
The top left circular hole with that white post in it is where you're pointing I presume? To read the voltage, I would put the red pin of my meter on the cable I pull from that hole and the black pin would then go where?

The other probe would go the the outside ring on the cable....when pushed into the ICM it makes contact with the outer sleeve.

I'm only pointing you to the CPS since you stated there is no spark. A defective CPS can cause no starts, intermittent starts, hard hot starts, etc.

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1993 190E 2.3
2001 SLK230
1971 LS5 (454) Corvette Convertible