Connecting DC power question

[BassWombat]

Another simple newb question...  :oops:

I've reboxed a modded Big Muff, and I'm setting it up to work with a wallwart rather than a battery. I've got a battery clip thing to connect to the existing one, and a DC inlet. The DC inlet has three contact points, whereas I've got only two wires coming off the battery clip. I'm assuming one of them is a ground, soooo...

How do I know which one is the ground and what do I attach it to? Also, anything else I need to be careful of?

Thanks again (you guys have been so helpful as I start my pedal modding career!)

[Eric H]

http://www.generalguitargadgets.com/v2/
Take a look at the articles

-Eric

[niftydog]

get yourself a multimeter.  continuity testing is the most useful thing in the world...

[zener]

Generalguitargadgets' wiring layouts have DC jack and from it you can see how it is wired :wink: .