The connector pin-outs can be found in the FSM section 8W-80. A glance at the fluid flow diagrams in the same FSM will show how the governor pressure acts on the shift valves and how throttle pressure interacts.

IMO the ideal controller would have adjustable governor pressure curves to emulate the numerous mechanical governor configurations of the old mechanical governor. For example, the old troubleshooting numbers of 10 psi governor pressure for every 10 mph is just general, the lightweight HP governors had different pressure values so as to shift later at WOT.