Chosen Solution

I have a number of W-290’s and I would like to set them off simultaneously. Can I teardown the camera to the shutter button and solder wires to that shutter switch and drag them outside in some discreet way so that I can operate the shutter from a distance?

@larryeda looks like you could solder two wires and a remote switch to replace S102 on the ST-208 board.

Post some good pictures of that board with your question. That way we can most likely point out where to solder the wires to. Adding images to an existing question