You don't have to swap the SB50 out, it's fine just probably overkill in ampacity and harder to find OTS adapter pigtails for.
PowerPole is the standard for 40A or lower, and IMO a good one.
It's the SAE I would eliminate, unless you only have a few amps flowing.
And IMO even then just not a great connector if it's being duty-cycled regularly.
Thus best case go PP to PP, no pigtail needed, just two pair APP kits and the right crimper.