How to add cymbals to a marimba part?

I'm currently working on an indoor percussion score, and I want to add choked suspended cymbal hits to marimbas 2 and 3, but I can't seem to figure out how. For now I've just added an F note and made the notehead an X with "sus. cym." written above it and an apostrophe for readability, but I would deeply appreciate it if anyone knew how to actually add a cymbal hit into the part.