Need assistance identifying electrical connection on heater unit

[Crispycruiser]

Can anyone provide help identifying the electrical connection on top of the heater unit (interior behind dash). Not the taped one.

I took lots of pics and labeled lots of parts to ensure I put everything back together properly but I must have missed this.

Thanks

 

[3_puppies]

follow the wires, does that go down to the fan blower motor??

 

[Crispycruiser]

It plugs into the bottom of the heater unit, under the heater core. It’s the water temperature switch I think.

 

[Crispycruiser]

I’m looking for the other side of the connection. What does it plug into?