This adapter board for the nRF52-DK offers the following:
You can use either a Phoenix connector or Dupont connectors for wiring the adapter board to the external nRF52. This adapter board supports either method. You may insert your ammeter at the probe point for measuring current consumption. Simply use a commonly available 2.54mm pitch jumper whenever you don't wish to use the probe point for measuring current.
The wiring for powering an exteranl nRF52 from a nRF52-DK was inspired by the wiring diagram (attached as a photo in the image gallery for this project) in this Nordic forum post: https://devzone.nordicsemi.com/f/nordic-q-a/14058/external-programming-using-nrf52-dk Incorporating these connections into an adapter board simplifies the wiring needed to power and program an external nRF52 from an nRF52-DK, thereby creating a neater, more "organized" connection. Although this is far from rocket surgery, having the connections reified in an easily mounted PCB is nonetheless a nice convenience.
When the development board is mounted onto an nRF-52 and wired to whatever external nRF52 you are working with, then whatever hex files you upload to the nRF-52 will be automatically programmed into the external nRF52 instead of the nRF52832 that's part of the nRF52-DK.