What I would do, and have done before, for matching cable
differences (not impedance matching :-)), is to drill out
the opening of the smaller hood to take the larger cable,
although using a smaller cable and an O-ring or grommet would work.
C: Drilling out a metal hood in anything but a lathe seems to be a recipe for an explosion
of sorts. Even in a lathe - that likely die cast crap. I dunno. I had thought of it but my
original objection was it would look all ugly.
?I would have thought there would be something out there I could purchase. Guess not.