Louis,
#1. You are correct. The DAQ Signal Accessory is not an option as an accessory in MAX. Since it does not posses any functionality that NI-DAQ needs to know about, this should not be an issue.
#2. Since it does not communicate with the E-Series device to which it is connected, you should be able to configure an SCC system without having it connected to the E-Series device. What is not working? Are you receiving an error?
Good luck with your application.
Spencer S.