That should be fine. If you have sonar interference, well you will have to home run the ground from the pump and remove the jumper. Grounding sucks.

The Minn Kota us2 has a sneak path to ground if the shield (knurled connector) is grounded. This connector shield is isolated with the Humminbird, but still creates some problems. Again, a lot of the noise is inconsistency in the manufacturers equipment, such as the boat wiring layout itself.