If you just want to see the pinout of the PAC-RT connector, check here.

If you want to see how to build a cable to connect a PAC-RT to a Syntor-X, check here.

For hooking up a PAC-RT to a Maxtrac/Radius/GM300, you will want to check this page.

The service manual for the PAC-RT is part number 6881010C09.