61
Every V1-X unit comes equipped with two magnetic pegs which t into the ports
at the side of the V1-M unit, (either side).
The other side of the peg can then be inserted into the ports on the side of the
V1-X unit. Thus, the two units sit together snuggly, connected by a magnetic peg.
See below for a diagram.
Fitting a V1-X Extender Unit