yup those are the ones, dont use the corner clips though, not stable enough and easily chewed, go with cable ties...easily replaced if they do get chewed on and ALOT sturdier
look for the ones that arnt brightly colored...ive never had a problem with chewing of the cube walls themselves unless the space is too small or the rabbit doenst have enough other things to chew on...but the conrer connectors seem to be too irrisitable.
good luck, they make wonderfull LARGE cages, but remember if your adding shelves and such youll need to put lino or something down on them, the holes are too big for bunny feet.