I am creating a technical drawing of a system I created. Let's call my system, system X. System X is a mounting mechanism for already invented system Y. System Y is customizable, however, system X is a general mechanism that can be fitted to any system Y.
My question is, when labelling my technical drawing, which includes a physical outline of system Y (otherwise the paper would have a lot of blank space), how can I articulate that my general depiction of system Y is replaceable with any customized version of system Y?
I am creating other drawings that detail the mechanisms of X up close without Y, however, in the case of my question, I am trying to create an overview drawing of what system X would look like when applied.