Greetings Laguna75, since routes in TZ are created in the Timezero layer they are synchronized over the LAN amongst all TZ devices. Once a route is synced to the MFD, it's as if it was created on the MFD and can be easily activated on the plotter. If not already make sure to include your PC in the same network hub as the MFDs and it all should sync up. You can review synchronization via Home > Settings > Initial Setup > Sync Log or you can view synchronization on TZ Pro. You do not need to "sign into" Timezero for sync to work locally on a LAN, but for cloud synchronization sign into TZ on the MFD (Home > Settings > General).
Nobeltec has an article on the process in their manual: (See Routes > Route Synchronization)
