Does the Z clip run the full length of the pad and is there a Z clip on both the top and bottom of the pad?

A pad will come with enough z-clip for the full width of the pad on the wall side, top and bottom. On the panel side it will come with two clips each 1 1/2" wide for the top and for the bottom. Each clip has two holes and a 3/4" pan head screw is supplied for anchoring to the panel. On the wall side the full width piece is pre drilled for anchoring, but not supplied with hardware, that is up to you and a decision of what hardware works best for you can be made based on the final application.