new handlebars, old master cylinder

gwyon wrote: ...wish I could find something more elegant than just two female terminals to make the connection at the master cylinder. Some kind of plug would be nice....

If desired, may continue using the stock brake line pressure switch and also the stock harness wiring.

I don't know about the possibility of removing the not-so-elegant switch at the master cylinder and what actions might be required to prevent leaking of brake fluid.

Good Fortune!