Does the Controller Have to be Isolated!

I am in the home stretch of completing my motorcycle conversion. When mounting the aluminum controller to my metal battery tray I got to thinking… does it need to be isolated somehow from the frame of the bike? Using rubber or wood or something so that it does not short out… I am new at this so please be gentle.

I’m trying to keep this forum going Gene, honest I am, LOL

It should not need to be.