But as of Cimatron version 12 there is some help for this issue.
Note the icon to the right of Hide and Show called Entities/Components Visibility.
You will see this in assembly, and it provides a hide/show option.
When this option is OFF (default) picking a line in a part will hide the whole part. But with you toggle this ON, you can actually hide and show part level
entities - while the assembly is active!
The specific steps are:
All wire will hide. You can do the opposite for showing the wire back. Use show, then make sure you are only filtering for curves.