Harness Set Up

Hey everyone. So, last night I decided to try to install my Pro Armor harnesses from my 09 that I just traded in on my 15 4 900. I ran into a little issue…. I know I can weave the shoulder straps around the rear grab bar. The outside belt I can use the bolt that bolts the cage to the frame. There is nothing to attach to for the inside belt or the sub belt… I did not have to drill any holes or cut anything when I installed them on my 09. How are you guys attaching your harnesses for the front AND rear seats? I’m curious to see how you install them and make it look really clean. Thanks for any help in advance!!
Thanks
Thom