Hi, I might be missing something but the wiring through the CDU switch and point motor looks fine but from the limited view you may have the power source as the 12v DC output of the controller. The CDU needs an uncontrolled output of about 16v AC to work. 12v DC will not work the CDU. The controller that is in the picture looks as though it may be from a starter set without an AC output.
If you have any more platform work to do some masking tape over the parts that you don't want polyfiller on saves a lot of cleaning up afterwards.
Hope the above is of use.
Woody