Is the fan to cool the esc or is it a 30/40mm fan to cool the motor your looking for?
When my son pulled the wires out of the fan that came with the esc i replaced it with a hobbywing 25mm esc fan same connector.
If its a fan to cool the motor i went for a 40mm fan and hard wire it to the batt leads on the esc. The idea behind this is for the time his car is sitting on the scrutineers stand after the race his motor is still being cooled. If it was connected to the esc when it was turned off after the race the motor is no longer being cooled.
HTH's,
Shiny.
__________________
|