1977 Ford LTD - Lock ID with Diagram

Tearing my hair out here. I've done probably half a dozen alarm installs over the past 20 years and have never had an issue. Helping my father out with his 77 Ford Country Squire wagon with a keyless entry. I've never seen this type of locking setup, and I can't quite match it up with the types listed. Rather than make a wiring mess. I could really use some help here, as I'm in over my head. Diagram from Ford wiring diagram booklet below. Description of operation.

https://www.the12volt.com/relays/relaydiagram3.htmlMy ex once told me I have a perfect face for radio.

And it will be easier to wire if you can locate the wiring between the door lock switches. Maybe accessible by removing glove box, right kick panel. Use the existing battery feed for the door locks for the relays, just need to run a pair of wires from the keyless entry.

Found the harness along the top of the dash, luckily. I should be able to find the actual solenoid wires (red hash marks, mine) vs the wires between the switches.

I'd say try, but it won't work. If you notice connector C1303 is on the input side of the switch as well as downstream of one of the door lock motors. That tells me C1303 is probably in the kick panel. The wiring marked by the red dashes is in the door. Making more work than is necessary. And if you can find the pink wires with the traces (the ones between the lock switches) at the top of the dash, then use them. If you tied into the wiring coming out of the right door, then that door wouldn't operate.

C1303 is along the top of the dash behind and above the glove box. Would Connector C1214 be a better choice? I have yet to find this plug.

If you can trace the wiring from C1303 and determine the side that isn't leading into the door....say at the top of the dash...then locate the wires, between the switches. The C1214 connector would require you to determine which wires (looks like two wires on one terminal...times 2) are from the switch and which are to the motors

I figured I'd post an update. I did find the wires. There was a 2" section where the two wires resided between the passenger door switch (master) and where it goes to the lock solenoids. I did end up having to go inside the actual door.