I got myself a Feelworld Field monitor since I want to improve my Youtube video game a bit.
But first I needed to build a AV Cable to connect my Olympus Pen camera to the (legacy) 3,5mm, 4 ring AV jack of the FW597 since olympus Pen camera do not support live video HDMI output.
Long story short, the pinout:
2, Video in
3, Right audio channel
4, Left audio channel
(1 being the ring at the base of the plug and 4 the tip of the plug.)