the Fly Clone Project

Need help with MIDIFly junction box wiring. Misplaced mine many years ago and have to make one myself.
My understanding it is a simple box with two MIDI connections and one power supply 9V DC with positive inside. But I need MIDI out pinout.
Please help with schematics or wiring diagram.
Thanks in advance.

Here’s what I have from the seller of a recent transaction. I can confirm that his design works. Components in the guitar need to see < 9v

Good luck