I have a 195RB and installed a Hengs Votex. My bath light is not on a wall switch so I used the wire there for my power source and ran it about 10 inches through the fiberglass insulation. Not really hard at all. The Hengs was a no cut fit for my vent and was an easy install.
I would suggest low temp solder connectors to get the wires instead of crimp connectors.
Once installed you will love the air it pulls through the RV.