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Yep they sure do. You just wire up the TRKA&B connections on the accessory decoder to your main track feeders.
I'm in the process of replacing all my Digitrax DS64s (long story) with NCE Snap-IT accessory decoders. And I use the Peco solenoid switch machines. I have a total of 24 switches on my layout. All remotely controled with my NCE dcc system.