Can you please tell me how to fix an axle to the L-clamp(which is fixed to the chassis), such that it is able to rotate, but not move sideways?

Yeah. I'm not allowed to touch the thing after triggering it at the start.

Ok, Sir, thank you.

Please reply, people...

Hello, The task that this robot is supposed to perform is: It has to carry some balls and move from the starting line to the finish line, drop the balls...