amps

i am hooking up my sound system and i have 2 amps and 2 subs wat do i do to hook up the 2nd amp do i hook it up to the other amp or what and wat wires do i use for that

http://www.crutchfieldadvisor.com/S-mdbJ0r5tXTf/learningcenter/car/amplifiers.html

Also www.bcae1.com is always good for learning that stuff.