Fitting help with push button start ?

[Bender]

Hi peeps,

I bought this push button start switch to replace my old one.

http://www.rallynuts.com/vehicle-switche...witch.html

Now at the back it doesn't have a positive or negative sign on any of the wire connection terminals, it only has, 1,2,3. One will be for the main live, other will be the negative and the 3rd will be the terminal for the illumination side of it.

Does anyone have any idea about these, im thinking that number 1 is for the main live, 2 is the neg and 3 is for the illumination ?

Also it did not come with any instructions so im unsure on the correct fitment.

Thankyou