I see that you put holes in the worn out sock that you used as a diaper... There is no need in using a diaper on rabbits, for they can't get into contact with their cecotropes which is a very important part in the rabbits health, if you are afraid of the rabbit spraying and pooping everywhere... I advice you to litter train it, if it is litter trained then please remove the diaper there is no need in putting diaper to a rabbit if litter trained. To make a rabbit litter train easily, you should spay/nuetur him/her for other health reasons and make litter training much more easier.
Here is a video on how to litter train a rabbit.
You see.... My rabbit is almost litter trained but in a very very different way, he does not eat his hay inside the litter box but outside the litter box so I removed it, he pees and poops in the litter box without hay, he does make oopsie everyday but only his poop is the oopsie, his pee is always in The litter box