I have a spool of that Mogami wire.
I make the inner conductor (with insulation) a bit long, then anchor the thing with the shield relatively short.
This makes the inner form a small loop.
The shield then takes the strain.
On the end with the un-terminated shield, I find a way to anchor the cable somehow,
so there is as little movement as possible on that fragile inner conductor.
Some locations require some creative way to lay the wire so I can anchor it, and have a small loop on the fragile connection.
The alternative is some RG-174 co-ax.
The inner conductor has some steel in it.
Can be hard to solder, but the wire is much stronger.
Ooops, my bad, it's the outer shield that is steel,
but the inner strands are much thicker and stronger than the Mogami.