It does look like the Campy style adjuster screws might fit, although perhaps too small.
I'd take the frame to a hardware store to test screw sizes. At least that will get you the right thread diameter and pitch. Also verify the threads are still good.
Are those really for tension? I bet they are a bit of a pain to use as they'll have to be loosened and tightened every time the chain or wheel is mounted or removed.