What is this thing sitting in slot 2 of my new DS lite?

good price, needs to pack replacement cartridge slots better during shipping shielding on the cartridge slot doesn't look like it was de soldered properly

slot for the reception of one or more of the outer- most of said cords az ds , and the adjusting

ds99 slot DS 6281 Redgate , H April 24 a ' m d a 6004 Fisher , R C , and slot A straight carrier

ds slot Slot 2 Dust Cover Door For Nintendo DS Lite NDSL & Game Boy Advance GBA ; Quantity 215 sold 257 available ; Item Number 223777336483 ; Brand Unbranded