help with battery relocation attempt

Wow there's a lot more to it then I thought.

When I was talking about a regulater box I'm not sure of the name of it but its stock on my car and it sits right next to the battery it could be a selonoid but I'm not sure.. I'm not good with electrical at all other then the relocation kit I got from summit racing with the plastic vented box what else would I need other then the 4 post quick disconnect, can the disconnect switch be mounted inside the trunk next to the battery or it has to be outside of the car.

O and I want to visit the track a couple times but its a street car and has a two wire amp