I have a BMV700 battery monitor (2 years old, works great). I I need to shorten the 10M (!) data cable. The data cable connectors are simply described as RJ12 in the specs. I have a 6P6C crimper and bought RJ12 plug connectors but these connectors don't fit into the place the data cable plugs into the shunt. Is there anything else I should know about the connectors to ensure I next purchase ones that fit? Thanks!