So hook it up to the power, so it will run all the time. Then if you want you can print some mount from thingiverse for second nozzle fan
I was having parts from makercoast, overall printed nice, but abs and around 25 infill (if i remember right) wasn’t enough and they were cracking and breaking Only lot of trouble, at least for me.
So its good. When I was ordering they were having only Abs parts.
Yes, wire it to the connector where you crimp your atx cables to ramps. I can take a photo for you, but give me 1 hour to get back home from university. You can also change in Marlin to use two fans, but its easier, and the fan is running after every power up of the printer.