What is this accessory that is glued to my turntable plinth?

I bought and rebuilt this Technics SL-B2 turntable recently. It's been running great but I'm unable to identify what accessory is solidly glued to the back left corner? It appears that some sort of post would slide into the hole in the middle and be held in place by the long screw that protrudes slightly into the center hole. The other screw is shorter and does nothing I can identify. The screws and entire assembly are non-magnetic so I suspect it's built of brass or aluminum.

Google image search hasn't been able to identify it nor have I found it on Audio Technica's website. I plan to remove this and clean the area but my curiosity would really like to know what it was for!

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Yes, rayma, I quickly edited my post when I realised my mistake!

I still use my Watts Manual Parastat record cleaning brush as well.

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"Manual" because there was also an automatic Watts Parastat record cleaning machine.

"stat" because of the anti-static fluid supplied to dampen the plush pads either side of the fine nylon filament brush!
 
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Decca made a cleaning arm with a carbon fiber brush at the end that worked pretty well.
But later they changed the arm from aluminum, to plastic with a metalized coating,
which never seemed to work as well. Decca's hand-held carbon fiber brush worked ok too.
 
BIB improved (?) on the original Watts Dust Bug by including a counterweight.

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Watts supplied a bottle of antistatic fluid to dampen the plush roller and avoid a build up of static electricity.

The nylon brush up front aided the tracking of the Watts bug's arm across the record, but, depending on the groove modulation, could introduce audible groove chatter.

Modern equivalents are available, but look at the price of this one! https://snvinyl.co.uk/Pro-Ject-Sweep-IT-S2-Record-Cleaning-Arm-Dust-Bug

This one's much more affordable! https://snvinyl.co.uk/Tonar-Nostatic-Arm