u/AdExtreme808

See photos for the hardware used. The dog crate is 22" long and had 2 doors, 1 on a short side and 1 on a long side against the house that was removed so Betty can access her catio from the window.

We wanted a catio so our very small cat (Betty) could enjoy the afternoon sun. (Betty joined our family after living under our shed for 2 months and is happy to be an indoor cat now.) Betty immediately climbed into her new catio and it was so easy that we plan to install a 2nd on a window that gets morning sun.