Oscilloscope connector

The inputs for the oscilloscope are regular BNC connectors, but the ground connector is one I'm not familiar with. It looks kind of banana plug-ish, but longer than what I'd normally expect for a banana plug.

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Here's the ground connector on the scope

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There's also this BNC adapter for some other kind of plug. Looks kind of like a phono connector.

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I was able to find a manual and service manual for the scope, which will come in handy.

Next step will be to plug it in and see how things are.