Hello, I bought a 4Runner with a 3.0 put in recently and as usual a couple of wiring connections are either cut or missing. If anyone can help me id wiring that would be a huge help. I also need help locating oil pressure sensor as my gauge isn’t reading and there is no plug in the direct area.

Thought it was oil pressure sensor but no dice

Possibly 4wd, might be plugged into the actuator but no clue where it goes

 

Hope you got answers already. That plug you're holding is typical of going on 'position' indicators. Like "Front ADD engaged", which is actually the one right there in your photo, on front side of diff.

Your oil pressure unit (if an SR5 type with a guage) is a small can looking thing right above the oil pan on driver side (below the oil fill) just in front of the filter. But it only has one lead; the engine block provides the ground. Its essentially a variable resistor inside that gets fed fed voltage.

 

Try Easternbeaver.com. He's an Aussie in Japan who specializes in Japanese motorcycles, but he has lots of stuff we can use. Loads of different connectors, too.
Check out the brass terminals while you're there. High quality Yazaki, the same as Toyota used, not the crappy stuff you get at the local store.
One time I placed an order with him the same day as Amazon and he beat Amazon by two days.