End Point Manager and Grandstream GXP2140/GXP2200EXT

I've spent the day learning and reading about End Point Manager. I have it doing most of what I want and its great. What I have not been able to figure out, is the programming for the expansion module attached to a GXP2140, which is a GXP2200EXT unit. I have configured my template and chosen the 2140 and 2200 in that template. I've tried to program some of the buttons and displays but I do not see anything on the sidecar unit when I reboot the phone and apply the configuration. What am I doing wrong? The phone is mapped correctly and changes to the phone occur, but not the GXP2200EXT unit.