Robot Web Services 1.0 in YuMi robot

I am currently working on jogging movement with YuMi (since this is the only robot without the three-position enabling device enabled) with the RWS 1.0.
The data params given by the reference only stated till axis 6 but YuMi have 7 axis. Is there a way to jog axis 7 with RWS?
Reference :