I might be wrong, but unplugging the connector makes no sense to me. The VTF and azimuth only matter when you listen to records and you can't listen with the connector unplugged so why would you unplug it as you adjust these parameters?
Also, I've never heard of a tonearm not being "intended" for MC or MM cartridges. A given tonearm might not be suitable for cartridges within certain weight range, but not specifically MC averse.
Also, I've never heard of a tonearm not being "intended" for MC or MM cartridges. A given tonearm might not be suitable for cartridges within certain weight range, but not specifically MC averse.