Newbie XFI. Been doing lots of reading on the subject. Creep isn't working and wanting to clean up trans brake wiring. Have read using A13 as a ground source has helped fix some issues. However it appears A13 is being used, or at least there's a wire leading to the kick panel in my Buick GN. Can I use A12 as a ground source instead? A13 shows Distributor Ground. A12 is Main Power Return (Ground). And can I feed both the trans brake switch and the creep button off of the same switch - A12? Or should I be using another main power return high current pin ground for the 2nd switch? Also I've got the launch switch T'd into my AMS500 boost controller ground activation. Is there a better way to do that?