Broken SD card reader - replacement needs special tape?

So, is it just any black tape or is there something else? It seemed like the original tape had metal in it too. Is the RF shielding the metal part? Sorry I just have no clue, I just know replacement parts didn't include the metal part so I'm unsure how needed it is.

Comments on Reddit mentioned it being thermal/conductive tape but didn't mention it they meant only thermal conduction OR if they meant electrical conduction, some mentioned grounding.

I'm just unsure what the metal part is doing and so what exact tape I need - I'm just confused by what seems like silver metal in the tape.

Electrically Conductive tape makes some sense to me, as it seems the metal part could be connecting to the motherboard for an electrical ground, looking at the photos in the ifixit guide

Nintendo 3DS 2015 SD Kartenleser Austausch

have you tried installing the replacement reader without the metal or tape?

if it works without it, its likely just shielding, if not it would be a ground connector and needs to be connected.