The "Duo TTL flash cable 100-150cm for 1 or 2 Flashes" I have for some time now in use. It served its purpose so far without restriction, but has the distinct disadvantage that the camera is remote hot shoe can not be locked in my hotshoe flash bracket. Thus, the attached to this hot shoe flash unit slips out again and again and then dangling from the very stable flash cable.
A few days ago I have a stable and cost-effective solution for the "Kaavie dual locknuts hotshoe adapter for 1/4" screw on standard hot shoe. "
The camera is remote hot shoe can be with this adapter screw, and thus the construction sits reliably.
The flash cables are relatively heavy and in the spiral cable design not as long as indicated by far. But for me it is enough.