Why is There a Circuit Board in the DS Lite GBA Slot Cover?

From Nintendo, the DS Lite has brighter screens and weighs less than the previous model but

Visible and functional on DS Phat, DS Lite, and DSi consoles (the 3rd of Fixed where launching a GBA cartridge in DS Classic Menu causes TWLMenu++ to restart

ds slot The DS Lite has a GBA cart slot which can be used to dump GBA games and saves from

ds lite gameboy slot Buy PCB for GBA slot chip of Nintendo DS Lite NDSL, chip board for card slot dust cover at Aliexpress for Find more , and products