I have a queston about a saltwater pool system. I recently puchased a 240 volt unit from Ebay. I am good at alot of things but I don’t want to mess it up. It is an Eco-matic system. The control box has a blue and brown wire for the cell connection, but the cell has a black and white wire. Have no idea which goes where, don’t want to damage the cell. Please advise with any information ad possible thanks so much.