When we picked up our 2551, I noticed that the smoke and CO2 detectors were missing from their mounts on the ceiling so I called back to Stuart and he arranged for new ones to be sent. I now have both and ready to install them, but not sure which location I should use for which. One mount is close to the cab area and the other is further back closer to the A/C unit. I was thinking the smoke detector should be furthest away from the galley toward the front, but I need to know for sure how they are located in other 2551's. Help, please!