CustomRV had installed the Prodigy on my Sienna (the Sienna was not pre-wired so they had to run the connections to the battery, 7 pin on the rear and tie into the brake light line). I removed it from the Sienna before I traded it in.
The Tacoma came with a harness plug under the dash with all of the connections already wired. It was a bit of a challenge to find the connector. It was wrapped to a larger bundle and I didn't know exactly where to look. Got some good info from tacomaworld.com and found it more by feel than sight because it was tucked behind the bundle and was facing the body of the truck rather than the interior.
In a plastic bag left in the glove box Toyota includes the other end of the connector with 4 loose wires.
You can either order a Prodigy Harness for the Tacoma and plug right into the connector under the dash (and not use the generic connector Toyota provides), or you can use the generic harness and match the wires yourself. Toyota includes a diagram of their side of the connector. After a bit of digging online I found the Prodigy side diagram and then just joined the wires.
Then it was just a matter of finding a place to mount it where it would be in the proper orientation. I found a spot near the fuse cover on the drivers left side that worked out well. A couple of screws later, I was done.
If you can join 4 wires, tap two screws and rest your head on the floormat while you search for the plug, it shouldn't be a problem
