TIP: You have to be careful not to lose the small screws inside the panel while doing the installation, this is the hardest part and our least favorite thing about pro panels.
Essentially the way pro-panels mount is you have to put the screw into the panel through the front and poke the screw out the smaller hole in the back of the panel the screw holds onto the panel from the inside through into the top. We do not route screw holes because Pro-Panels do not come with the exact screw alignment each time. Due to this issue, we will only route a cord hole and channel.
Other than lining up the cord, placement isn't critical, we try to minimize the length of cord that is inside the enclosure. Snakes tend to try and coil on the cord sometimes if they can which can be problematic.
Please use the #6 x 1/2" drywall screws. They should be included in your shipment but if not, you can find them at the local hardware store.
We advise using some blue tape (any tape will do) to tape the screw onto our screwdriver, that way the screw can't come off the driver until you've tightened it into the top. If you look at the panel, there are two holes on the panel. On the front, the hole is slightly larger than the corresponding hole on the back so that the whole screw can pass all the way through into the panel and out of the smaller hole on the back. We use small screws because they need to fit through the small holes on the panel, and still be short enough that they won't poke all the way through the top of the cage when you tighten them. The screw head should not be able to fit through the smaller hole on the back this allows the panel to be mounted, while hiding the screws -- like we mentioned, this method of mounting is our least favorite thing about pro-panels hence the "use some tape to hold the screw onto the screw driver" -- otherwise it's highly likely you will lose a screw in the panel.
Just put the screw on the end of the driver and wrap some tape around the screw head and the screwdriver shaft -- doesn't take much, but it makes all the difference. Also, don't over-tighten the screws.. they only need to be a little tight, and can strip out if over-tightened.
This should be all the info needed, if there are any questions, please don't hesitate to contact us at firstname.lastname@example.org