I made the inspection of the new custom DSub cables (came from Texas).
The shelled version gives us some chance to inspect/modify the internal connections. (good)
The wires are well insulated. The conductors are wrapped with the foils and then everything is in the braid tube shield. The braid is soldered on one of the connectors. (Attachment 3/4 shows the soldering of the conductor by intentionally removing one of the insulations).
It wasn't clear that if the conductors are twisted or not (probably not).