Where does this plug go?

We have been rebuilding a 3VZE since the summer. We bought it taken apart so it has been a mystery at times figuring out where things go and what is missing. We are close to being finished. The harness on the drivers side has the oil pressure switch connector but there is a 2nd plug with it that I have no idea where it goes. Can anyone help identify it?

 

Can you show a picture of the other one in place so I can trace it on mine?

 

Sure, the oil sending unit is plugged back in with the unknown plug sitting next to it. The other pic shows them together in the same bundle.

 

Tried to see but I couldn't get under the 4runner to see where they go. Not enough room in the garage. If I get a chance I'll pull it out tomorrow and take a look. Sorry for the delay.

 

I figured it out. It goes to the A.D.D. harness towards the front dif. Our truck A.D.D. has been bypassed/jerry rigged so we dont need it. Thanks!