I've got some examples in a thread linked here. https://ball-pythons.net/forums/show...de-Crook/page2
I've used both corner brackets and 3D printed perch holders from Specialty Enclosure Designs. It's important to make sure the perch can't spin while the animal is using it. Was actually listening to an episode of Morelia Python Radio last night where someone mentioned a snake taking a spill off the rotating perch and suffering some spinal trauma. The SED perch holders have a "key" on one end that prevents the perch from rotating, you just need to cut a notch in the perch for it. For my corner bracket perch holders I have thick twine wrapped around the perch, knotted and zip tied at one or both ends to fit in a notch on the brackets. This may or may not be visible in the image in the thread above.
Can be as simple or elaborate as you'd like. Others on her have also made some neat perching/climbing options using pvc pipes and couplings to build a small jungle gym of sorts with interesting results.