OK, various documents offer an interpretation of the meaning of "system" according to IEC 60601-1. I quite like the one found here.
Quote
Combination of equipment in which at least one is classified as medical electrical equipment and is connected by functional connection or use of multiple portable socket outlets.
If we agree that is a sound definition, with the key word being "combination", then I would say that your colposcope is not a system as such, but rather a single item of equipment.

An example of a medical equipment system that I usually like to suggest is that of the "theatre stack" - insufflator, camera unit, printer, suction etc. all sitting (in "combination", or "functional connection") on the same trolley, and typically fed from a multiple socket outlet powered from a single cable (plug).

Regarding the need to be bonded to the stand, I can't see that 60601 specifically requires this; although my personal opinion has already been offered.

If you don't inspect ... don't expect.