Im trying to get my 250ex going. I bought a Leviton NEMA 6-50 plug and receptacle. Im hoping some one can tell me which wires go where. For the receptacle I have two black wires and one green wire in the wall box. The everlast wire has black, white ,red and green. My garage was wired two years ago by a licensed electrician with a 50amp breaker and propper gauge wire. Please help.