wheres the how to on 60/40 to 40/40. i cant find it

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2003 ford ranger xl single cab, 5 speed 2.3l, k&n 57 series CAI, hurst equipped, 60/40 seat mod, full length exploder console, flowmaster super 10 ran out the back with 2.5 inch piping, 15x7 Cragar soft 8's,general grabber at2, kenwood kdc-x794 excelon series headunit with amped infinity kappa 6x8's with a 10 inch kicker solo classic run by a 750 watt mono block kicker amp with 2 gauge wire in a sealed box with 2.0 farad capacitor, ultra gauge and 2 kc daylighters 130 watt.