a spring and a ball bearing fell out of my rear end

[jstay]

I have a 1996 txt that i just finished a valve job on and decided to change the rear gear oil.. (No service manual for the rear end just the motor). Anyways i picked what i thought would be the most likely bolt for the drain plug. I was wrong because when i took out the bolt i felt something fall out of the hole and when i looked down i saw a small spring and a ball bearing under my cart. Does anyone have a diagram for a 1996 txt? or maybe just knows what this is for. all the diagrams i found online are for different years and do not show this. If it helps the bolt was bottom toward the front (motor) on the right hand side.

Sorry for the title but thought i may get a little more views this way