where to connect db level gauge

hi guys, i recently purchase a "db level" gauge at radio shack i was wondering where excatly should i connect it at my sounds?

[IMG]https://i82.photobucket.com/albums/j258/LL_JAY_C00L/dblevelgauge2.jpg[/IMG]

At the back there are 4 terminals in those two is for the db meter and the other two is for the light.

[IMG]https://i82.photobucket.com/albums/j258/LL_JAY_C00L/dblevelgauge1.jpg[/IMG]

btw my ride is mitsubishi delica van that has a set-up of two phoenix gold subs total of 600watts,

for further details,here's the link http://www.cardomain.com/ride/632440

thanks in advance

A meter manufacturer usually gives you a specification sheet that tells you how much current it takes to move the meter to it's highest reading.  The part of the meter that moves is called the meter movement.