Need help identifying Engine Parts

[WacoSportTrac]

I need help identifying two electrical connections on my Ford Explorer Sport Trac engine please.
- The first image shows the location on the engine that the two plugs sit.
- The second photo shows the first plug, which is located just behind the oil cap.
- the third photo shows the second plug which is located toward the back of the engine compartment, in front of the passenger seat.
Thanks!

 

[koda2000]

third photo - I believe that would be the connector to the A/C low pressure switch. The red wiring is not factory.

IDK about the second photo.

 

[david4451]

Second photo shows knock sensor connection, it goes to centre of engine block under inlet manifold. Again red wires are non original