SME 20/2 Tonearm Ground Wire: Where in the table should be connected?

As I recall . . .

The single ground wire (spade) in the phono cable loom is the main ground which connects to the phono preamp.

The second ground spade in the phono cable loom is simply to engage the shielding - it’s the two wires exiting the RCA rears joined together. I typically prefer this connection left hanging (not attached) unless noise is evident.

On a different ground point, many later V2 Motor Controller Units had an additional ground wire terminated with a ring terminal - meant to go to the ground post directly on the motor.

Great phono system! 🎶

@vusi_khumalo 

Do u have and explanation on why not 'engaging the shielding' improves sound?

While I don’t care to discuss in absolute terms for fear of being attacked, unshielded signal leads can often provide a larger playback image that seems more open. Such results are worthless if RF or other noise creeps in - easily remedied when the shields are attached to ground.

Should I further break the join between these 2 ground wires from the L & R RCAs?

I see no benefit from disabling or attempting an asymmetrical shielding scheme.