70 charger factory 8 track crossover questions and wiring

[70RTSEFB5]

I have a 1970 Charger that orriginally had the factory am 8 track player stereo in it.  I found one and am reinstalling it in the car.  Can anyone tell me where the crossover box mounts under the dash,  I cant't find any pictures in the repair manual or references as to this.  Also did this setup use the same front to back fader that  a 69 b body would use. Thanks in advance. My email is shannonhunt427@msn.com