There should be 4 plugs in the ceiling about 14" apart marking the location of where the A/C should be mounted. Also, make sure you have the cross-braces mounted to the underside of your roof to support the added weight. Fleetwood had SPECIFIC instructions for cutting the roof and mounting the unit as well as a poorly designed mounting kit. Make sure to follow these instructions carefully, especially cutting the hole if you have a Filon roof.
FWIW, if you have a Filon roof as I have, I would NOT add an A/C at all. Even following instructions roof cracks can still develop. Fleetwood stopped making and supporting PUP's a long time ago but the installation kit is still available somewhere online.
Adam
