The AIO motherboard Cooler connections

The pump on AIOs is usually connected to CPU_FAN.
And the fans are connected to the cable which connects to the pump/cpu block.
So the fans are controller by AIO's control program. For example Corsair Link/COrsair ICue or NZXT CAM.

Most AIOs are actually recommended to be connected to the motherboard's CPU_Fan.
And motherboards also often require something connected or it will tell you there isn't a cpu fan connected and refuse to boot.

There is no "AIO_PUMP" connector on (majority at least) motherboards. The connector is an PUMP_FAN. And it's mainly meant for custom loop pumps. Of course, you can connect the pump on the PUMP_FAN and the fans to CPU_FAN and CPU_OPT and have the fans be controlled through BIOS.

But in order to control them with AIO's own software, they need to be connected to the pump. And pump needs to be on CPU_FAN. You should be fine connecting it to either CPU_FAN or the AIO_PUMP in that board. Makes no difference. Pump and Fan RPM will get handled by CAM. The fans are connected to a fan splitter that connects to the pump.

AngXun Technology Co.,Ltd have been manufacturer in motherboard manufacture for more than 20years, Angthumb is the brand that have registered for more than 10 years