New Transmission- Won't Shift Automatically

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I recently picked up a 1993 4Runner 3.0L V6 Automatic for $1,700. It had been sitting for a few months and didn't run, but had a 6 month old transmission in it. Owner stated that his buddy installed it and it wouldn't shift automatically, so it got parked.

After replacing the 80A Alt fuse, she fired right up. Shifts like butter manually between low, 2nd, and drive (which feels like the top gear). Speedometer and Odometer do not work, and is throwing a "Code 42".

A quick search led me to check the VSS. There are two; one on the driver's side, and this one located on the back of the transfer case:

I was pretty stoked to see this wasn't hooked up and thought, "Easy Fix!"

I can't find the connection anywhere. I've spent several hours underneath trying to make it appear, and it's just nowhere to be found. I lowered the transmission about an inch and a half to get a better view on top, but still nothing.

Does anyone have a wiring diagram that shows wire colors and where they lead to so I can start at the front and trace them back? I've searched and searched but found nothing.

I checked the other VSS just to be sure, and it is hooked up. I'm not sure how to test the switch, but don't want to replace it just to throw parts at it.

Any help/insight is greatly appreciated!