Include

[cement]

You cut the actual corner out of your enclosure, so you end up with a three sided cube.
Measure your lights etc, make up the cage as the other three sides to the cube.
Put the wire three sided cube in the enclosure and nail it to the end grain of the enclosure.With fibro, or small flat headed nails.
If you cut the wire so its in a "L" shape you only need one piece of angle to cover sharp bits.
Youll be surprised how strong this method is. Use maxi bond to glue the angle in place.
Then put back the corner you cut out of the enclosure and use the side panel for access into your lights. Or the top panel, whatever suits you depends on wether you stack your enclosures.
Really good for ven's, as you can change the lights in a hurry and can not get bitten, your not actually in the enclosure.
Hope this helps you.