Waveshare NRF52840 User Manual page 22

NRF52840 Eval Kit User Manual
The schematic of Eval board is as below:
Header 4x2 are jumpers on board：
If you use official SDK, don't forget to pull L3 jumper and wire it to P0.15 (Do not
require if you use 001_LED).
Vision: V1.0.1 Date: 2019.01.19 22 / 72