You'll unhook the connector to the trans and test the trans side. I find it much easier if you hit a JY and get a piece of the wiring (piece that you'll unhook to test it) and then use your piece of connector/wiring to test it. Otherwise you are trying to get pins etc and that's a pain.
So key off.
Once you get the subframe down and lower the drivetrain..it's not so bad. Or maybe I've done it a few too many times?