Tap directly to the battery for the load, instead of to the load port on the controller. Things just tend to go better that way, for any number of reasons (below). For the similar-looking Bioenno controller for my LiFePO4 battery, the manufacturer goes so far as to say to do things this way and ignore the load port.
Possible reasons:
- Potentially less noise, since output current is straight off the battery and not being routed through the controller.
- Low steady current controller, high current radio load. (This is the case for my lead-acid battery bank, where the 8 amp controller is all the panel needs but it can't handle a 100 watt radio load.)
- Maybe the damn output port doesn't work at all anyway, because cheap manufacturing.
- Phase of the moon / I don't know.

Anyway, it does no harm to run directly from the battery, and it bypasses a potential source of trouble.