Rohn KR0HN was “parts shopping” online when he came across a microSD card extension cable.
This could be used to extend the microSD card slot of the Nextion display out to the exterior of the case. This would be handy for upgrades to the display firmware as new features become available for your display.
The link to the amazon page is: https://www.amazon.com/Extension-Extender-Flexible-Monoprice-Raspberry/dp/B072X27V58/ref=pd_sim_147_14