What kind of bracing should I do in my box? Just like two 2x4s or what? Never done bracing...., also for terminals can I just use brass bolts or something? Find do too much power for a terminal cup. And which direction should my port face? Subs have to be on top of the box cuz it isn't tall enough for them on the front.its two mayhems in a 4.7 cu ft box in a2003 Chrysler Sebring lxi. Box is 12 tall 28 wide and 32 deep