One thing that can give a better signal if you have issues with this wiring.
Use a pair of relay contacts in place of the switch, Move the actual switch to remotely toggle the relays on. The shorter wire runs from Terminal block to track will make DCS work better.
This also lets you use lower power rating switches. The Relay contacts have to carry the heavy juice, the relay coil and switch won't need it.
One relay for each siding.