Backup Game Boy Advance Cart Saves With a DS Lite

So I l'm curious as to why my DS Lite's GBA slot cover has gold pins on it, if it's just a dummy cartridge to act as a dust cover and to

How to Play NINTENDO GAMEBOY ADVANCE GBA ROMs Games on 3DS In This video shows

nintendo ds lite gameboy slot Lost your NDS Lite SLOT-2 cover? Here you go

nintendo switch lite game slot If you are a fan of GameBoy Advance games, then the best way to play them might be on a DS