Best place to mount fish finder?

Cant decide on the best place to have fish finder mounted. Old finder is mounted next to steering wheel but my boat has a remote troll and I think I would rather have it mounted in the back. My problem is I’m afraid it will get bumped alot by fishing polls and what not if its mounted top center in back. Would it be best to maybe have mobile mount instead so it can be moved around? Any suggestions are welcome?

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Put 2 or 3 RAM mounting bases (balls) wherever you think you’d like your sonar, and then you can move it wherever you’d like. Just be sure you leave enough power wire and transducer-cable length to reach the locations.