Yes-
However, it may be more pragmatic to put the connector in the relevant mechanical equipment component's family definition... i.e., so there is a 1:1 relationship between the equipment and the connector in the 'model', instead of having the equipment disassociated via a separate 'symbol' on an electrical 'plan'.
Martin Schmid, P.E.
Autodesk Consulting
Martin Schmid
Product Line Manager
Mechanical Detailing and Electrical Design
Architecture, Engineering, and Construction
Autodesk, Inc.