This is where it can get sticky...you can just rotate the lever down, and slide it in a little and mount the clutch lever on the left bar.
Some will mount the front brake lever on the right bar, like a motorcycle or scooter, and put the rear brake on the left.
Some use a dual pull that operates both brakes with one lever.
I use coaster brake bikes and add a front brake with the lever on the right, like a motorcycle.
It's up to you.