I am running 220 volt 50 amp service from my house to my garage where there will be a receptical. I have a 50 amp breaker I nserted into the fuse box with 6-3 wire. The wire has 2 hot and a alumimum grounc. Now my generator ia a 5000 watt 41.7 amp single phase generator. How do I connect the wireing to backfeed from the generator through the 220 volt 50 amp receptical to power my house? Oviously the main breaker is off when generator is in use