No.
I think I would go the other way.
But these bikes suck so I think I'll just sell mine and get a Honda.
Hi Phil,
you could look for a thin enough coaxial cable to fit through the hole and of course thread the co-ax through first and attach the terminals afterwards.
And if I hadn't part-exchanged it for my XS650 I coulda still had my CB450 but I'd have to change my sign-in name to Blandintoon.