Where to tap for GPS hardwire on '03 Protege?
 

Got my wife a GPS unit for Christmas. I'd like to hardwire a 12V receptacle out of sight for it and her Sirius unit but have no idea which fuse to use the piggyback with. There's a fuse for the rear wiper (obviously no wiper on the sedan) so is that the easy option here?

Quick edit to add I need it to be switched power so the battery doesn't get drained.