Interconnect board looks oriented fine. The pins look fine too, just make sure it’s very snug. It’s a tight fit.
You can try another sd card if you have one. SDHC not SDXC, format fat32, and use a PC not a Mac.
The key writing rom set has some hacks in it I think, progear halfway to hell or some character hacks on some fighting games. If you look at the KEY file in a text editor you will see a bunch of FF FF FF.... those are empty keys. Might look like ÿÿÿÿ... You can try those, or that fully decrypted set (but you still need empty KEY files in the game directories).