What style starter are you using? I assume it's a modern high-torque style starter. The way you are planning to wire it may allow the starter pinion gear to stay engaged for a second or maybe forever when power is removed.
Wiring it this way may allow the drive to stay engaged: battery to "A" terminal on Ford solenoid, "B" terminal connected to the starter mounted solenoid power lug, jumper to the "S" terminal on the starter solenoid.
Wiring it this way will not allow starter drive to stay engaged: battery to "A" terminal on the Ford solenoid, "A" terminal to the power lug on the starter mounted solenoid, "B" terminal on the Ford solenoid to the "S" terminal on the starter mounted solenoid.
See directions from Cool Cats here
COOL CATS :: Tech Center: Advanced: High Torque Starter Upgrade
Or from a Nova guy here
Scott's Nova Resource Site - Remote Starter Solenoid Installation