Anet A8 cooling fan mount. You don't need external motor drivers.

thingiverse

I have discovered that it takes minimal airflow over the Anet motherboard to maintain a cool temperature, with drivers remaining comfortable to the touch. In contrast, stagnant air causes them to heat up. With approximately 2600 hours of print time on this machine's motherboard, I have encountered zero issues. I am utilizing a spare 70x15mm fan type AFB0712HHB. Although nominally designed for 12v power, it runs silently when powered by a 6v powerpack. The heatsinks on the board remain cool even while the printer is operational. To ensure easy maintenance and facilitate SD card insertion into the port, I prefer to keep the board open. This bracket extends upwards from the backside of the board's stock mounting holes, measuring 40mm in length and angled at 45° towards the board. To secure the fan, I employed 3mm hardware. The design can be printed in any desired style; I opted for a simple three-layer print with a 10% infill thickness of 0.3mm.