pickup wiring

Hi,
I've just purchased a 'pickup and three controls plus jack socket' from China.
Great price, and it all looks OK.
Problem is, no wiring instructions.
Basically, there's a red and a black wire from the pickup, ready to be connected. Then the tone/volume set-up is as follows:
Pot 1 has a blue wire soldered to the casing, which is also soldered to one terminal. there's also a black wire from the same terminal going to the casings of the other two pots, and then the earth terminal on the jack socket.
Then there's a white wire from another terminal on pot 1 going to a terminal on pot 2 and pot 3. Finally, there's a black wire from the same white wire terminal on pot 3 going to the centre on the jack socket. There's also a green
capacitor thingy on pot 3.
Hope this makes sense, it does to me, but I'm sitting looking at it!
I just want to know which terminals I connect the pickup wires to?
If I 'trial and error' can it do any damage?