the pin sockets are through hole mounted, so I just soldered 3 more pins worth of header to the butts on the other side facing out. Didn't explain very well but I just added pins onto what was there to pass the +V, G and signal straight through. This may be only applicable to the white one (sourced from makerfarm) so there could be differences, although I think this is like the RAMPS pretty consistent between mfgrs.