If your rabbit has the run of the house, then you don’t necessarily need a run unless you feel the need to take your rabbit outside.
If you leave the zip ties, make sure they are facing outward. Your bunny is likely to chew on anything inside the cage, so point the ends of the zip ties outward. Make sure you pull them tight and clip off any excess.
Generally, they are long enough that you can build a pen you can walk into. However, you can also turn them so the length runs along the ground, creating a much shorter pen. For instance, you could use the kind of panels that are solid on one end to create an impromptu hutch for your rabbit. [14] X Research source
However, be sure to cover the bottom of the cage with plenty of fresh straw to protect your rabbit’s feet and to change the straw out regularly. [17] X Research source Be sure to push the wire ends into the ground, so no one gets scratched on them. You can also put in a wood floor, if you prefer.
To join using brackets and screws, lay the panels flat on the floor. Make sure they are as close as possible. Lay out 6 brackets along the seam. Use a drill to pre-drill holes where the screws will go. Drill in the screws. For corners, use corner brackets. [20] X Research source