Frogs hiding up back of background

[EJT97]

Sorry for the poor pics, ipad playing up but if I explain it it might help:
basically I have cut out the bottom corner of the background so it doesn't start rotting (due to water). However, where there is a section for the wire to go up the frogs keep climbing up it, also, they are avoiding the land part during the day, to start with I thought they were adapting well, however, they are just hiding in that corner. I can barely see them and they look very bored and lazy.
in my old tank they were fine and moved loads, the food was always gone but they were outgrowing it, but I thought if I get a big tank I can get them some more frog friends.just wondering whether it would be good to block it or not?!