March 1972 manufacture date. VIN ending in 03051. Early 72 car I think..
The "zip cord" wires were clearly a part of the original wiring harness... Maybe something they found in the speaker box that day so they decided to use it!!
I have been troubleshooting British car wiring systems for over 50 years so I have seen almost everything..... I actually like troubleshooting electrical issues.... Something clearly wrong with me....