Proof of concept:
Obviously not a Ross switch but concept should work in place of the standard 3-wire cable to the manual lever controller. Above shows an AC-to-DC voltage regulator module (about $3) to convert Accessory AC to 12V DC as required by the wireless relay modules. If powering the AC-to-DC converter module with 18V track AC under DCS-command-control, add the 10 cent DCS choke/inductor to the AC power feeding the regulator module.
Here it is in action: