That is where mine are also. They showed up after about a month long camp in cold temps that required much venting of condensation during the day. Even though camper was vented during furnace use in cold nights and vented all during the day, the amount of condensation build up quickly deteriorated well cared for camper. The electric jacks circuit board also went out from moisture building. Also the insulation on the ceiling over the cabover has started to become unglued hanging by the escape hatch trim and headliner fabric.
