In the OP's case if it was me I'd remove the stripped one from the shutter and re-tap it with a straight tap then use one of those Rowi.Kaiser type 90 degree adapters and glue it into place before screwing the part back on the shutter casing.

I use an M4 x 0.7 tap on the Thornton Pickard release arms and that seems the best overall fit, I can use a size up or down because of the taper.

My experience is that there's quite a variation in the threaded end of cable releases, I had some that would only fit a Prontor and no other camera/lens.

Ian