Unrecognized DEC Power Supply in PDP-11/44 Configuration

Does anyone recognize the (presumably) DEC power supply on the front half of the rack-bottom in the 11/44 listing at: https://www.ebay.com/itm/363640137050 Blurry photo, but it looks like there are a 4x3, a 3x3, and a 3x5 Molex connector, and two brown mini-modules protruding from the right side. If so, then what purpose did it likely serve? It appears that the 6U immediately below the 11/44 was likely occupied by an RX02 given the presence of an M8256 in the 11/44 backplane (and skinny mounting rails, although I thought those were usually at the bottom of the RX02), and that included its own power supply (which wasn't very beefy either, nor did it need to be). What went into the 6U immediately above the power supply is unclear; there is a HEX Wespercorp TC130 Tape Controller as well as three unknown QUAD modules in the 11/44 backplane. Perhaps there was a horizontal autoload tape drive mounted there that required a separate power supply? Curious! paul