Dash Power wire?????

by the guage cluster i am refuring to the whole pannel that all the guages connect to, including the wiper, lights and flasher buttons. Id like to run all of my stock guages, but if its not as hard i will run an aftermarket amp guage that hangs off the bottom of my dash(the metal part) ok i kinda get the running of my wires to the amp guage, but i dont know what is pos and neg on the amp guage. Like i said id run the stock guage if possible but if its harder or lots of wiring...then no. i dont get how things worked then i pulled out a couple wires that were hack job'd now it dont this is lame. where can i hook a power wire up to my insterment cluster(the guages) to get them working