2305 Dead, no electrical

[LoganWildman]

Hello all, Does anyone know where the ground points are for the dash/underdash wiring for a 2305? I had the tractor out, did some loader work, then used it to raise the front of my zturn so I could replace the blades and shut it off while I was doing the blade change/deck cleaning. I then went to start it and the oil light flickered a few times and the starter wouldn't engage. Subsequent times of turning the key to run and no lights at all. I tried the light/flasher switch and nothing there either. Troubleshooting steps so far are; Master fuse, good, 4 fuses on right side also good, battery 13 volts, starter 13 volts, main fuse good and 13 volts. Auxiliary panel in the cab, 13 volts and the aux lights, wiper and heater motor all work. Pulled the lower dash cowl off, checked the white/red wire going into the key switch, 13 volts. Checked the white/blk wire going the the dash light switch, 13 volts.
I have someone taking the battery in today for load testing and replacing the battery ground cable (precaution because we replaced the batt clamp several years ago)

I am really leaning to a ground issue, but am not sure where all the chassis grounds are located.

Thanks
Alan