With this adapter, you can convert a “donor” cartridge (an original Snes cartridge) to another game by simply dropping this pcb on the back side of the donor and soldering it to the existing MASK ROM pins. You do NOT need to remove the MASK ROM.

• This Super Nintendo Adaptor PCB supports most 4mb games.

I'm looking for the 2mb adaptor: 2mb adaptor board

Read the manual to find the list of donors this pcb will work with: Adaptor pcb Manual