[QUOTE=coolcolors;2686641]Are we even talking about what the OP posted? Also where is a pic or link so we know what your talking about?[/QUOTE]
I, as the OP, will just step in and say - yes, it’s Kryoflux related. If you look at the images of the board in the first part of my review here, you might see that the board has USB, a 2.5mm DC barrel jack, a 4-pin ‘molex’ style connector and a four pin header row in between the USB port and the barrel jack configured for a berg connector pinout.
The confusion often arises because people think the board might need additional power but this is generally not the case. These connectors can add flexibility where there is a need to adapt or split the power source, or in case of new standalone modes being developed. Incorrect power source with poor jumper selections may fry the board by bypassing regulators!