Hello, I need some help modding my brothers original 3DS. I decided to go with a mini USB port (I am aware of the dangers with using this more common of a port). I successfully made an adapter. I used a MicroSD to SD adapter. I tore it apart very careful like, I stripped the wires on the end of a mini USB cable and soldered them to where the MicroSD card normally goes. I then took a mini USB port and soldered four wires on to it. I know where CMD, DAT0, and GND go. However, I'm having trouble figuring out where I solder the clock signal, CLK. Looking at pictures, it appears that I need to remove the game cartridge "shield". Is this true or is there an easier way to find this connection? In the picture I'm following ( https://gbatemp.net/threads/micro-usb-or-micro-sd-mod-on-normal-3ds.363454/#post-4945027 ), it appears the guy creates a pad and has it connected somewhere to the underside of the PCB. Any help would be greatly appreciated. Thank you!