Originally Posted by
Yamato72
This. Or if I can identify what the stops are that the shift cables use. All 3 guides at the top of the downtube appear to be the same dimensions.
There's a good chance they are very similar, but not identical. Specifically, they holes may be the same diameter, the overall length is the same, but the two shift spots are blind holes, while the brake guide is a thru hole. There isn't a pretty way to add back the material that was likely drilled out of that third cable stop, unless you're handy with a TIG torch.