Adjusting the Silent Circuit?

Finally got the new pickgaurd and pickups in my new Cutlass and was wondering if anyone has bothered trying to adjust the silent circuit? It might be my imagination but the new pickup/pickgaurd assembly seems to have a little bit more noise than to original that was sent back due to squealing single coils.

I’ve circled what looks to be the adjustment doodad – is this what gets turned?

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