In your post on the other site I speculated that the blues went to the safety switch. I now think that's incorrect.
After looking at a relay and that close up picher I think the blues go to relay pins 30 which would be the motor leads. Either the two on a two wire motor or the up and down on a three wire.
Gonna have to study the pics more. To try and understand what's going on with your motor.
Also, where does the safety switch connect? Maybe the connector in the red wire? Looks like it feeds the switches. Unmate it and connect to the switch in series if you have it; leave the connector mated as is if you don't?
Sic friatur crustulum
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.