I didn't see it posted any where, exactly what model, year yours is. You can get the wiring diagrams off Winnebago's site for your coach if it's not too old. I would recommend that you download all of the diagrams and safe them for your records. They will come in handy just for things like this.
Use them wiring diagrams and the hookup will be easy. As far as the actual install, you will have to get creative and make your own attachments to what's in the dash to hold it in.
Been there done that