Ender 3-S1 Displayback with SD-card slot

Ender 3 upgrade - drawer with SDmicro slot extension ender 3 sd card slot Put the gcode file in the micro SD card that came with the Ender 3 and plug the card into the slot on the Ender 3 Print Quality If you assemble the Ender 3 ender 3 sd card slot Ender 3 V2 Neo

sevens high ultra slot I see there is a slot on the side but it is hollow I can't find anything in the manual or online, everything online is for the se not ke