That's what I've done, but the opposite. Installed a 50 amp breaker and a dedicated female plug in the garage. Output from the generator to a 50 amp rated cord connected to a male plug that goes into that house female plug. First, turn off the main breaker so there is no back feed. Hook up all the cables and make sure 50 amp house breaker is off AND ALL THE OTHER breakers are off. Fire up generator and let warm up. Turn on breakers from the generator, turn on dedicated 50 amp house breaker, then slowly turn on the home breakers that I need. You'll have to label all your breakers for the house because some of them you won't need to use and save power for the generator. I keep the kitchen one on, stove is a 40 amp breaker and it stays off, living room, bathroom, one bedroom and the floor freezers if it is in summer time, but those things stay insulated for a pretty long time. Yeah, I know it's not the right way to do it and technically illegal, but in a pinch, it will work.