Radiant Heat Panel installation

[Greta's Human]

I've got my new snake (Obtained February 15, butter pastel ball python, she's 3 months old and 108g--I haven't got a length on her yet as I don't want to stress her by overhandling her so early) in a 15 gallon tank with CHE for now. She's very happy and I have probably more temperature readers than I need to ensure redundancy (probe type), as well as a thermostat, multiple hides and a humidity of 55-60%. Her warm end fluctuates from 87-90F depending on the room temperature (my house temperature drops at night so her enclosure drops slightly too) and her cool end is 78-80F. She's eaten f/t rat pinkies for me three times and seems happy and we'll be moving up to f/t rat fuzzies for her next feed as long as the fuzzies aren't too big (the ones at my local reptile shop have been about 19g lately which is 17% of her weight).

I've also got a really nice front opening 40BR Zilla terrarium that I'm working on turning into a bioactive for her when she outgrows the 15 gallon. I want to use radiant heat panels in the new terrarium, but I don't understand how they attach so I'm not sure if it's compatible. Could someone show me photos of how it actually attaches? I've seen photos from the bottom (inside the setup), but I'm looking for photos of how the screws work from the outside of the setup. Photos from both sides would be best if anyone has the time. I *think* I need to get a piece of PVC or acrylic to lay on top of the terrarium (which has a windowscreen type mesh top and plastic panels to sit in the windowscreen top for humidity) to attach the RHP to, but I'm not positive. I just don't understand how they attach properly to be able to make this happen for her. My roommate has a ball python in a bioactive enclosure that I helped set up, so this isn't my first bioactive enclosure that I've experienced, but when we set that one up we didn't know about radiant heat panels and just used CHE. I think RHP seem like a better option for her permanent enclosure, though, if I'm understanding correctly.

Thank you so much for helping me with this. I've googled but I can find a lot of photos of how to make DIY RHP and how they look inside the setup, but not many that really help me understand the attachment points.