In John 21, where did Jesus tell the disciples to cast their net?

Answer: On the right side of the boat

After a fruitless night, they cast the net on the right side and could not haul it in because of the great number of fish.

“So He called out to them, “Children, do you have any fish?” “No,” they answered. He told them, “Cast the net on the right side of the boat, and you will find some.” So they cast it there, and they were unable to haul it in because of the great number of fish.”— John 21:5-6 (BSB)