Before integrating with TT ELD, please add the VIN numbers of each truck in Datatruck.

Then you need to get an API key for integration from TT ELD, please go to your TT ELD account's settings and find Api Keys tab and copy the Api Key.
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Then you need to enter this api key to datatruck, go to Settings -> Integrations -> TT ELD Integration and paste the api key. Now Datatruck TMS is integrated to your TT ELD and you can monitor the current location of your trucks in the map section.