Thanks, Cojack.
My above picture is poorly angled: the ground is there just not visible. It's screwed into the same spot as op suggested.

Let us know how it goes, bags519, thanks for the info.

I'll give my configuration a closer listen soon and give us an update.

Thanks for the guide, op.

Trouble shooting anyone? Is this a successful solution or will it cause trouble?

I'm getting no input through the Lch terminal indicated by the op (nothing through the left speakers). Although I seem to be getting it through the terminal beside Lch (see picture). I ...