Now let's see what the left board has to offer:

Another soldered joystick (like the Razer Kishi)

Four gold contacts for the direction pad and four holes to keep its silicone cover in place

Two clickable silver contacts (tactile dome) for the screenshot/record and option buttons

A soldered 3.5 mm headphone jack

A soldered bumper button

A soldered Hall sensor (Texas Instruments DRV5053) for the trigger button