RT-BMS Manuals and the CAN connector (L) pin change
A quick overview of the RT-BMS product support documents:
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-A.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-B.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-Info-C.pdf
http://www.ev-power.eu/docs/GWL-Power-RT-BMS-parametersEN-D.pdf
Also see the information related to the CAN bus:
http://gwl-power.tumblr.com/tagged/CANbus