SC-2 switch and acc controller please help

[SD-40T-2]

do i run a wire  from the  SC-2 to the track  i understand the instruction

[chuck]

do i run a wire  from the  SC-2 to the track  i understand the instruction

I'm not sure about the question

ASC's use a daisy chained command wire that is connected back to the command base.  SC-2's pick up signals from the outside rails of the track like a locomotive would. 

There are three ways to power an SC-2 and I prefer a direct connection from an AUX power supply.   I would recommend not using track power and I am not a big fan of the seperate wall wart transformer.  I've wired up several SC-2's and not had problems when I used a dedicated auxiliary power supply.

[luther_stanton]

The SC-2 needs no external wiring for CAB-1 signal.

I run mine in a 4 switch / 2 accessory configuration.  I power all my Atlas switches with a seperate 16V bus.  The switch connected to the first terminal block powers the SC2.  Works well with Atlas switches - completely troublefree.