Got a different view on this drawing:
http://www.winnebagoind.com/diagram/...ire_145049.pdf
Using "cntl and C" to expand the view, I can read it better and see the positives are NOT connected together but the three red leads are one from starter off page to left, one from start battery positive and one to solenoid. Then in yellow I marked the coach positives tied together and then a lead to the solenoid. That looks right and should work, assuming the solenoid is okay, etc.
Check if your batteries and cables match that?
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!