Unfortunately it’s not. I sent that off to another member shortly after that first post. Sorry!
Check out the other threads mentioned previously. They are pretty easy to make. Just take your time.
My last LX had a Nak system and I wired my own adapter with no problem. Didn't even need to bypass the amp. It was truly plug and play once I was done pinning.
Theres a great how-to here: Nakamichi Update - '99 LX 470 -...