help with installation

i will be wiring up the system in small episodes on my breaks between studing for university exams. i know how to do the power wire,

but what would be the easyst place to attach the ground wire in the hatch?

and what color is the accesory wire that i need to splice in to for accesory wire for the amp?

im still using the stock mp3 deck, so i will be using speaker level imputs on my amp insted of rca's, and my pioneer gm-222 amp does not have a low pass filter. i will be geting a deck with a low pass leter on, but for now is the another option for me, can i make one?

i connected my ground to the bolt that keeps th rear seat in place
any of the bolt's will work great ground current there
i do audio installation's my side job any question let me know

accesory wire blue,yellow,or red 16 gage why these color's because
the accesory wire is a live wire contain's electricity and those color's mean + possitive ........ for electricity

since your are using speaker level input's you should use PAC those are the best speaker level inputer's

search for PAC RCA CONVERTER'S

I grounded mine to the ground for the rear hatch light. Worked well.

like these guys said any accessible bolt will do just fine. Just make sure to take a piece of sandpaper and rough the paint off around the bolt so that you get a nice metal-to-metal conductivity...