Here is what you get from the box, a handlebar basket and a loom extender.
Remove your previous handlebar by removing the 4 front bolts. You will also need to remove every items that are on the handlebar. Fit your handlebar basket on the stem, then tighten the 4 front bolts.
Before you move onto any step further, make sure you install the loom extender, you can find the instructions here.
You can then re-install every item on the handlebar.
Make sure you reconnect every cables properly.
That’s it! Your handlebar basket is ready to be used!