Hi, here's combined part- and hotend cooling for Ender-2. Part cooling fan is wired to motherboard K_fan connector, check polarity when connecting.
With this cooling, there is no flow from hotend fan towards print, so ABS prints will get better in strength. Standard 5015 fans can be used. Included also hotend front piece, in case different part cooling used.
Fan fixing holes are ~2,5mm so it is possible to make M3 thread on them. M3 thread is recommended on hotend fan fixing.