Pokemon HG: Machine Part?

Okay, I'm having trouble finding the machine part in Misty's Gym. I beat the Team Rocket Grunt at Route 24, and in my old Gold game, I went to the gym to find it, but I have no idea where it is. Do you have to do anything after battling the Grunt?

'Look in the liferings from all sides'.

search on the upper left part of the gym,ON THE LIFERINGS

Thanks! That was quick!