MpviPro to Mpvi2Pro analog input question

I'm switching from the MpviPro to MpviPro2. I had 2 analog outputs going into my old Mpvi1, had separate grounds for each input. The newer Mpvi2 only has a common ground. So with my 2 analog outputs, do I just parallel the grounds? I have the dyno wideband, and another 0-5v output which I have scaled as dyno hp/tq output that goes into the scanner, which has it's own ground. Soooo Wideband and dyno outputs with 2 separate grounds. Is it ok to just parallel these together at the Mpvi2 black wire?