Yep ! The Dell DA-2 is the answer !!
12V @ 18A = 216W
As for the connector, I performed surgery. 3 white wires (+12VDC), 3 back wires (Ground), red (remote voltage sense, not required) and blue (connect to ground to turn on).
Luckily, I found a DC5521 (5.5mm OD, 2.1 pin) barrel connector on
Amazon with 14 AWG wire attached. It made the connection "do-able".