this is a really dumb question. I have a couple of used recessed lensboards of different sizes. The have the little trigger releases with the bent rod that trips the shutter. I expect that both are broken, because they don't work (at least as far as I can tell.) For instance the one on the wista recessed board that I just received, none of my cable releases screw in. There don't seem to be threads to catch anything. There is a red button on it that slides down (spring loaded) but it doesn't seem to do anything either. (i've tried sliding it down and inserting the release, but it doesn't catch or do anything useful.)
As I said, I expect both of these are just broken, but I've never used these things before, so maybe there is just something I don't understand about how they are supposed to work. I assumed the cable just screwed into the top that that was it.