Not sure on yours, but my 1998 243RKS has a breaker box behind one of the cabinet doors at the bottom of the kitchen cabinets.
My fresh water tank drain is at rear under tank...I have a sticker one side of coach at left rear that says "low point drain." It will be under the tank in any event.
1992 Ford F-350 XLT, Crew Cab, Longbed, 4X2, 7.5L, E40D, 3.55, Tru-Cool Max Trans cooler
1998 Jayco Eagle 243RKS
Anderson Ultimate 5th Wheel Hitch
2014 Gregor Eagle Center Console, Mercury 60HP 4 Stroke, Garmin 93SV FF, Motorguide Xi5 GPS