Those tokens “xx” “yy” are places where Ctrlr will insert values in it’s memory so “xx” is the value of the Combo (the number of the item selected on the list, or a value that’s hardcoded in the combo contents), “yy” will be the MIDI output channel set for the panel.
I think you might need to use the “ls” “ms” or “LS” “MS” tokens, those represent bits of the value, that is if the value is larger then 127 those two tokens will split it and send it to the device in a split way. Now it depends on the device what sort of a “split” it understand, you need to dig into the manual of the device to find out. Based on the sysex it looks like a Roland device, so you might need some complex stuff here.