u/Efficient-Emu407

(Sorry if my grammar isn’t good I’m not the best at spelling and I am a bit slow)
I have this 2 month old kitten that I keep in a cage for her own safety from my older cat, she has all the necessities like food, water, bed and her litter box but I take her out of the cage to play and roam with her in the living room when my older cat is in the basement or outside. I put a second litter box in the living room since has already pooped on the floor before and she hasn’t had trouble since but she like refuses to pee in the litter and pees on the wires in a corner. Since I’ve gotten her she hasn’t had a problem using the litter box in her cage.
I wanted to know if there’s a product I have to buy so she uses the litter box in the living room, my older cat has no access to the litter box.