Mark SignalConnector as protected

[Cyber-Machine]

What does this PR do?

Fixes #11483

Does your PR introduce any breaking changes? If yes, please list them.

NONE

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[rohitgr7]

hey @Cyber-Machine !

thanks for the PR.
Check out this #10121 for reference. The class will stay as it is.

[Cyber-Machine]

hey @Cyber-Machine !

thanks for the PR. Check out this #10121 for reference. The class will stay as it is.

Thanks for feedback! I have implemented the changes according to the reference. 😄

[tchaton]

LGTM !