Thanks! Looks right.They look like the Hirschmann C-16 series to me: 6 Pole + Pre-earth CA Series Line Socket | Jaycar Electronics New Zealand
I really doubt that they would give me the info.Or, you can just call Johnson support and ask them:
888-9-levelsLaser Levels | Rotary Laser Levels | Dot Laser Levels | Line Laser Levels | Laser Torpedo Level | Laser Level Tools | Laser Level Accessories | Johnson Level & Tool Mfg Company
Laser levels including rotary laser levels, dot laser levels, line laser levels, torpedo lasers, laser level accessories, optical instruments and industrial laserswww.johnsonlevel.com