The mounting plate on the bottom of the set is identical to the one on my Sharp (2 locating holes + screw hole) ... Perhaps RCA sold a tilt stand similar to the one for the Sharp ? The base for the sharp contains the AC power supply.
jr
This recent thread on "packaging" has some great pix of a Sharp, which clearly show control and jack locations:
http://www.videokarma.org/showthread.php?t=249963