For people starting out with CV, gates, triggers, midi, sync and so on, Teenage Engineering's oplab module for the OP-Z (I also made a printable cheatsheet for OP-Z ) is a wonderful starting point for experimentation. The connections and what they do can be confusing at first though! I made these cheatsheets for myself, but perhaps some of you will find them useful too. Have also posted my draft notes on a practical intro to CV.

This is the sticker I'd stick on the OP-Z when starting out, where red means you need a splitter or that you can't use a mono cable.

mono cable on the right

For more detail, see below:

view from the top of the OP-Z (when the module is inserted)
view from underneath the OP-Z (when the OP-Z is open and upside down)