I suggest that you give consideration to the National Capital Trackers wiring plan for their modules. They have developed a solid method over years of display activity. The links for their module standards and the wiring harness are at the bottom of the web page. The operate with DCS and Legacy
The North Penn O Gaugers have also refined a wiring system to operate with DCS and Legacy without issues. Again, developed by experience. Their booklet describes their method
Taking what those clubs have learned and applying it to your system should save you a lot time and headaches.