How was the layout connected to the old ZW? or How many of the A,B,C,D posts did you use?
You need to connect those to the two posts in the Lock-On.
You can use an orange or blue wire nut and twist the existing transformer track leads from the old ZW and twist them to a new jumper wire to make a single connection for the Hot and the Common.
edit: You may need a yellow wire nut - but, you get the idea
