Amiga RAM 2MB Memory Upgrade for 500 0.5MB CHIP Plus 1.5MB Slow
Then both PCBs need to be connected by 2 PINs wire (included). - Option number 2 with soldering. After this one path on JP2 jumper on your Amiga 500 motherboard need to be cut. Also one wire need to be soldered from Gary Adapter to JP2 Jumper.