How do I install and remove my Olli Drink-thingy?

To Install Olli Drink-thingy

Step 1
Position cup holder tongue at slot on left side of booster seat's fabric cover (when facing booster seat). 

Step 2
From the bottom, slide tongue up completely into the slot until it stops.
 

To Remove Olli Drink-thingy

Step 1
Push down on the cup holder and slide cup holder tongue out from slit on the booster fabric cover.

Step 2
Remove cup holder.