Pry open the Sequoia from the top (Camera side) using a plastic tool to avoid scratching it
Unclip the connector
Remove the 2 torx screws (using a Torx 6 screwdriver)
Gently lift out the first board, then remove the next 2 torx 6 screws
Gently lift out the middle board. Remove the small white plastic holder
All components shown separately
If wiring for UART access, connect GND to GND, and then RX to TX and TX to RX. Then, re-assemble the device without its casing and connect to a USB-to-UART/RS232 device.