hey guys, i've been getting more of these controllers on my route. Prints are easy to come by, but i have yet to see a manual of any sort. i have had a few calls on these and the prints are easy to read but the prints do not have a relay nomenclature. has anyone encountered these controllers?

Its a Vertitech Controller

Had a few of these for traction. Only have a generic print with no nomenclature, my usually issue is the resistor opens.