b_2m_dockingPort CtrlPort Orientation wrong

I just noticed that the DockingPort of the `b_2m_dockingPort` Part is rotated upside down. When setting `Control from here` and trying to rotate towards the target, you will end up backwards to the target. 

This has to be fixed in the mu file, I used Blender for a hotfix, but I guess the maintainer has the sources. 