electrical fan problem

ok i wanna plug my fan direcly from a switch inside the car and am not verry good in electrical how do i plug the switch. i have 2 wire comming out from the fan and i have 3 connection comming out from my switch, power/acc/ground. the wire coming out from my fan are green(positive i supposed)and black(ground) .and what should i do should keep the original wire that are plug on the fan and just splice the wire so i can get an other wire from that one or should i just cut the wire and never mine the comp and plug in direcly fron the switch inside

Okay, am I presuming that you want to bypass the factory sensor and controls that turn the fan on? And just hardwire a switch in the cabin to manually turn the fan on and off at your command?