Ok so as promised here are some pics of the latches installed. Thanks for the tip Rob much easier locking solution.
Doors closed and locks engaged:
Magnetic knob on the outside holding the lock tab in so the door can open:
Now a neat feature, as you see in the first pic the red lever is down. If you hold the lock tab in and flip the red lever up it will hold the lock tab in so you can open & close the door with out the magnetic knob:
