Rear seatbelt bolt location

Hey guys, I’m currently working on my ’68 Cuda and trying to install my Schroth ASM Rallye 3 harnesses.

I saw that to avoid using a harness bar, I can use the rear seat belt mounting points. So I removed the rear seat, but now I’m seeing several holes and I’m not sure exactly which ones are the original mounting points for the rear seat belts, or where I should attach the harnesses. I’ve included a few photos, if someone can clear this up for me, that would be awesome!

Thanks in advance.