Solar panels to keep coach batteries charged over winter

Another question I would like input on is this one. Is there a preferred way to connect to house batteries. I have a gang of 4. Do I connect red lead of chg controller to positive terminal on one battery and the black lead of of charge controller on the neg term of same battery? Is this the same as the pos lead on pos term of 1 batt and neg lead on neg term of an entirely different battery of the 4. Will they all get charged up with either connection I do?
Thanks all again.