[pjmoreland]

Basically 12 volts to that connector on the transmission will allow the torque converter clutch to lock up. The 12 volts should be from a fused source that turns on with the ignition switch. It should be routed through a second set of contacts on the brake light switch so that when the brake pedal is pushed, the torque converter clutch disengages. The 12 volt line should also be routed through a manifold vacuum switch that disengages the torque converter clutch when manifold vacuum drops off when you press down on the accelerator. There should be a vacuum delay valve in between the manifold and the vacuum switch so that the vacuum valve won't click on and off really quickly at mid-throttle.

Sounds like all you'll need to do is plug the wire back into your transmission, and make sure the vacuum switch is connected to the intake manifold. The vacuum switch should be mounted up high on the firewall, above the distributor.