people often ask me what these things here are what these are is they're called Cleo pins and we use them to hold our panels in place and they look like this okay so what happens is it kind of works like a rivet you got a pair of pliers and the pliers hold it like this and when you squeeze it like this you can see this gets smaller than the back and when you release it it expands and it has a holding capability built into it because there's a spring inside so basically what you do is you drill a 1A pole in your panel and then you insert into the two panels I should say and then this inserts here like this and then you release it and it holds your panel I'll put a link below so that you can buy them they'll come in a kit you know this copper is a 1/ 18 size they have bigger ones and you'll obviously need a pair of pliers but check them out Cleo pins good luck on your project