A rotary tool was used to make a tidy slot for the microSD card. The ReMarkable already has a set of pads for an SDHC interface on the main board ... can mount a second SD card with the right ...

So we feel for [Arsenio Dev], who placed an SD card slot next to an SoC ... crafty set of bodge wires that curve over the board and connect to an SD card adapter on the other side.