All the wires are on the front panel of the power supply, they are in the form of screwable sockets. To insert a wire, first unscrew a socket, insert the wire, and then screw back on the wire.

First let's setup the power line wires.
Locate the sockets marked L, N and Ground wire sign (see pic)

Take a 110/220 wire, remove the chuko plug by cutting the wire.
You will find three wires, the most important one is the green one, usually with yellow stripes (see next step). This one is the Ground wire.

The two other wires will have different colors depending where you are on the planet. Those two wires are interchangeable, they will go in the L and N ports.

Ok so now let's insert the wires, first unscrew the sockets, then insert the wire, then re-screw the socket, make sure the wire is fully in.
Do this for all three wires.
Make sure the connections are clean, and there is no contact between the wires (make sure no metallic thread is out of its socket)

To make all this as secure as possible, add a good amount of hot glue on top of all this.

Don't hesitate to put a lot, to make sure the wires are well kept in place and the screws are totally covered, preventing any potential contact.

Now for the 24v power wires, locate the sockets marked as "V-" (or " COM") and "V+". They are usually organized like on this pic, with all negatives on one side, and all positives on the other.

Same as before, unscrew the socket before inserting the wire, then re-screw the socket. Make sure the wire is fully in and tightly attached.

Now take a waggo plug, and insert the red (+24v) wire.

And do the same with another waggo plug and the blue (-24v) wires.

Take the white LED power wire, and insert two jumper wire like on this pic.

Insert the red jumper wire (+24v) in the +24v waggo (with red wire).

Do the same with the GND wire from the LED panel, into the waggo with the blue wire (-24v from power supply)