Change media volume when connected to particular BT device

I know, I know, this is probably the most elementary thing I could ask for, but it's been years and I don't remember any which way how to navigate Tasker.

Simple task is, when connecting to a certain BT receiver, turn media video down to half, when disconnecting, default back up to max.

I think once this is under my belt, I'll be able to work out the rest, but would appreciate any help!

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