Verus Scope Setup Question

I want to set up my Verus scope to use all four channels on a 4-wire GM IAC stepper motor. My question is regarding channel 2. Should I stack the ground wire for that channel on to the channel 1 ground or leave it disconnected and only use the green cable ignoring the black? The reason I ask is because I do not have ground wires for channels 3&4 so I don't know if I should not use it for channel 2 also. Thanks.

You're working with this kind of test lead , right?

You're good to leave the ground from the green cable dangling. Same with channels three and four. Ultimately, as long as the black port on the Verus is connected to a good ground, then all the channels are good to go. No need to stack anything.

Yes, that's the one. Thanks much Tyler!