how to install this on in my truck because i am getting a stock cd player for my truck and got a sub and amp off of craiglist and i want to hoook them up together

http://www.walmart.com/ip/Scosche-Fo...-FAI-3/1863065

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1999 2 wd4 cyl2.5l5 spd135k
MODS:5% tint all around Night Shades (Extra Dark)Corners Thrid BrakeTails Air silence removed 2006 Mirrors Flowmaster Super 44 (Weld on & Turn down)
35W 5000K Hids

looks like you would connect it between the radio and harness.

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Beaten up '05 Ford Ranger XL 3.0

MODS-Alpine CDA-105 head unit, throttle cable mod, painted rims, pooleo's camo painted bezel and mustang dome, fold-a-cover