compatible with Passap E6000 cable chain mod: curly cord replacement

E6000 cables are no longer available. curly cords are obsolete technology. over extension immediately ruins them and the specific type of plasticized pvc sheathed cable needed to make them is hard to come by or very expensive. Modern manufacturing and automation makes extensive use of cable chains. The E6000 was released to market just before patents expired on cable chains. Cable chains were very expensive at the time but now are cheap and dominate the market.

prototype version BOM:
at least 2M of 6 core shielded cable. This used RVVP 20AWG: https://www.aliexpress.com/item/1005007324682835.html
1M 7x7 cable chain: https://www.aliexpress.com/item/1005007435939757.html
DIN connectors: https://www.aliexpress.com/item/1005009403273824.html
M3 theaded inserts(4mm)
16mm M3 screws(what I had laying around in bulk): x4 for the tension mast bracket, 5x for joining the two halves of the curly cord end bracket
3x cable ties for securing the cable to the end bracket. two in the holes, one around