Wire gauge and combined wires for 3D printer hotend through PCB
The connector pins and wire are not your major concern.  The traces would have less “ampacity” unless designed for greater max current in event there is no PTC or fuse protection. Web data exists for these trace “ampacity ratings” as well as free Saturn PCB software.

Ohm’s Law defines each power and return voltage drop or power dissipation per unit.

If you expect hot power connect or disconnect or contact oxidation from salt spray , that certainly helps with redundancy. Otherwise if it has bifurcated contacts, these provide contact redundancy on connector sockets.

Your connector is rated for 15A and is flash gold plated for corrosion improvements. Most contacts rated for =2A offer gold plating, but this one is better unless arcing on emergency “hot” disconnect may “pit” the gold plating on the surface 10u” flash gold from cable inductance. But you would not expect to do this.