I have had the same situation several times. If you are usung a Middle Atlantic AXS rack, just cut the uprights with a hack saw. You dont have to worry about a service loop if you are using the arms on the back of the rack although you cant use the arms on a short rack as they only come in 1 size. If you cant use the arms, use a bungee cord attached to the wire bundle at on end and the other end to the top rear of the inside of the cabinet to keep the wires from sliding under the rack when it gets pushed in.