I realize this is probably a ridiculous question, but I need some help.

For some reason, my gas pedal fell off and I have been driving by just pressing on the throttle linkage arm that the pedal mounts to. My question is, how exactly does the pedal mount onto that rod. Is it just as simple as it looks, can I just put a small bolt through the pedal holes and through the linkage and secure it to the arm? Or do I need some kind of spacers or mounting hardware?