I don't think they ever install them (although it would be nice). Probably best for you to learn how to do it yourself as you'll want to know how when you replace or if you ever winterize (but you're in FL, so maybe you don't).
Anyway, I'm not familiar with your exact model and don't know where in the trailer its located, but the following is general enough that I hope it helps you.
- Turn off the water pump at your control panel.
- Find your water pump and nearby you should find an inline canister.
- Place down a towel and a bowl under the canister to catch water and use the canister wrench that came with the trailer to loosen it counter-clockwise. Unscrew the rest of the way by hand.
- Place your filter inside the canister, tighten up and test for leaks.
The instructions should also be in your trailer's manual (although it may be useless in its description