360 pad question

Allright I hope I can post this here. I was wondering how I would find out if this controller is common ground. I’ve got a multimeter ready but I don’t know where to start.
Could you circle where I should hold one of the probes to begin with.
Thank you in advance.
I’ve got some pictures here:

Right off the bat i’m going to say no, however i could be wrong if its a newer revision of the pad

MS pads are very very very difficult to work with

I got it from the xbox 360 bundle, I got shortly after new years.

most likely this pad from slagcoin

most likely not

Yeah I’ve seen that picture. Its nothing like the pad I have.