When running a GEC from either a SDS or a panel, the GEC must be protected from damage, is this correct?

Have found alot that are either tywrapped up, or even leave the MDP via a romex connector and go through a sheetrocked wall and then over to building steel.
Most of it exposed..

I remmember seing somewhere on one of these threads a connector that was used on EMT that housed the GEC. This connector bonded the EMT,or Rigid at the top where the GEC left the pipe.

Does this type connector have a trade name?

Any help here?

And another question, do most of you bond the SDS in the transformer or at the service panel?

Which is best and why?