And another question, Jameco PSU has 2.1mm x 5.5mm female output connector, and MikroTik USB Power injector accepts 1.1MM x 3.5MM, that seems like quite a problem.
I just ordered an adapter - actually a whole bunch of adapters of different sizes, since I didn't see the specs when I first ordered, and the adapters were so cheap. Trial and error, but I found the solution. Has worked well for a couple years now.