No documentation or writing on or near the terminals, just came in a bubble wrapped packet.
But if you turn the controller up side down and look at the printed circuit underneath screw terminal 2nd from the right (this is the terminal 2nd from the right in the pic) it has a path of solder that runs to another 3 connections - all the rest of the screw terminals on the printed circuit just have dots of solder.
Do you have the ability to measure resistance (ohms), like a multimeter? I can't tell from looking at the pictures, but you should be able to measure across some of the terminals and adjust the dial to determine which pathway is the one you want.
I bought one of those (or something similar as well).
I don't remember which of the many sellers I bought this from, but one of the listings for this item had a schematic showing which terminal to connect to what. Have a look at other similar listings on ebay and I'll bet you'll find it.