Connectors

I used these for my breakout boards. They come in various sizes (2 pin to 8 Pin) and straight or right angled. Brilliant and cheap.

https://www.ebay.co.uk/itm/10sets-2EDG-6Pin-Plug-in-Screw-Terminal-Block-Connector-5-08mm-Pitch-Right-Angle/272057967451?hash=item3f57eb235b:g:ilQAAOSwiLdWCm9S