Sure, check, but I'd give 2:1 it's fine. Low power buck/boost converters are so cheap these days that I bet this board has one for each output. But that doesn't mean it isn't worth checking.Just make sure to measure the 12v output if you're using it, particularly with a 3S battery. Depending on the regulator they used it may not output the full 12v with less than a 4S.
Also, if you want to add caps to reduce noise radiated from or picked up by the wires out to the devices you're powering, then you're better putting the caps at the device end of the wire. A little better. In the wire lengths we're talking about it won't make much difference, if it's noticable at all. For that matter, adding the caps likely won't make a noticable difference in tne first place. These are just things to keep in mind if ypu actually have a problem,which ypu proba ly won't.
But do twist the wires. It may help and costs nothing.