On the drivers side rear, by the dinette. Cost me $75 for the window and $11 for a 1" rim. Grew a few more gray hairs cutting the hole, but all went well. I was afraid there might be some support structure behind the wall, but there wasn't. After I started cutting it took less than an hour. It's about an 1/8" off level, but that's as good as it gets with me. I'll attach some pictures as soon as I can get the attachment manager to work.