House chime is not as simple as the installation guide shows

The above is my home’s chime box. Where do I hook up the two wires for the Pro Power Kit v3? I tried calling tech support but omfg what a nightmare. They don’t listen, are not helpful, and now I’m regretting that I even purchased this stuff. I need a simple answer, please. Trans and Front, yes, I know that, but which of the 9 screws? The 3rd and 4th from the left? Thanks. Sorry for frustration but Ring phone support is total crap. UPDATE 2/19/24 found the brand and model of chime: Broan C305RW and it’s completely incompatible. It’s on the list. Wonderful. So stupid and makes zero sense. Can’t it be altered to work? Why buy a Ring pro power kit if certain chimes can’t work?