I just put it under the seat (on it's back), or on a towel... someplace where it won't be disturbed (some boats let me put my camera in the cutty). If the salt sits on it for an hour, it's not going to hurt anything that fast. I don't put it in the "public" rinse bucket. That's how yours ports get scratched, and your housing can be jarred by others, and break the seal a little (very bad).
If I'm going for a long SI - like more than an hour (rare) - then I'd rinse it with a hose, or a quick dunk in a rinse bucket.
After i'm done diving for the day, I rinse thoroughly (in clean water - in a tub, or with a hose), and push all of the buttons, and work all of the slide mechanisms to make sure the salt water gets flushed out from those.