With thanks to the community which is pointing us in the right direction, we have been working to transform our static carriers into dynamic ones - following the Top Gun example.
Looking at the reference_points.cfg it seems clear that:
attachpt_cable_X_Y are the attachpoint for cable X, with Y=1 being the port position and Y=2 being the starboard position. These generate working cable and work fine (except a graphical issue that I will highight in a separate question).
Could you please clarifiy what are the function and position of: