Help figure out where 2.7 L / 3RZ electrical connector goes

I haven't been able to find where this last electrical connector goes. It seems to be the only one that's in the passenger side rear of the engine compartment area. It comes out of the harness from that plastic piece that goes behind the cylinder head. It seems to naturally want to go on the passenger side of the engine (verses over the top of the valve cover and to the throttle body and such).

 

ect sensir?

 

And where was that small ground strap connected?

 

I'm pretty sure the engine coolant temperature sensor is the one that's already hooked up to the thermostat housing. This wire won't reach that far forward, nor across to the throttle body area. Thanks.

 

Theres a coolant temp sensor for the computer on the back of the head, the one at the outlet on the front is for the gauge. The ring terminal needs to go to the head or the block, its a ground.

 

*** UPDATE ***: I got it. Thank you so much!

Oh yeah, that part that's between the firewall and the back of the cyl head! Thank you!

I can't see back there, even with a shop mirror, but I'm trying to figure it out by hand. Does anyone know if the sensor is on the actual head plate?