Using it in series for 24vAC
Join PINK and YELLOW (yellow!) wires, and insulate from the rest of the world. This is the center tap.
24V AC comes from the RED and WHITE wires.
Connect mains power to the orange wires.
IMPORTANT: !!!!
PUT a 1.25 A Slow Blow Fuse in series with one of the primary orange wires.
It's easy to get the smoke out. Hard to get it back in again.
I assume you are making a power supply and will have a rectifier on this unit.
You will have to get rid of up to 25 watts of heat from the rectifier, so make sure it has a good heat sink.
Smallest Jaycar heatsink for this is HH-8570. 2.5 degrees C/Watt or lower is required to give a trouble free power supply.
Try not to put any switches or fuses in the secondary side.
If running stepper drivers run individual pairs of power wires to each driver from your filter capacitor.
Ask more questions before trying things and you won't have to put he smoke back.
Super X3. 3600rpm. Sheridan 6"x24" Lathe + more. Three ways to fix things: The right way, the other way, and maybe your way, which is possibly a faster wrong way.