Well you can try what Sara Luvs Her Tinky suggested or this:

Put him in a small room with his food, water,bed, and LB. Then shut the door and leave him in there for a day. The next morning check on him see if he peed outside the LB. If he did spray him with water keep doing that till about for a month or two or a couple weeks after he pees in the LB. Now let him out and put the LB whereever. Now if he starts peeing outside the LB again put all his stuff back in the little room. Repeat this until he uses the LB no matter what.

Or before he goes to the bathroom, scoop him up and drop himin the LB.