First, head over to https://app.datatrics.com/integrations/bookingexperts/. Click on the "Install" button, and you will be redirected to the settings screen:
​
​

You have to fill in your API-key, Admin-id and Organization-id.
​
You can find the API key over here;
​

The administration ID can be found in the URL when using a specific administration in Booking Experts or when clicking on the administration switch tab, see the screenshot below. Normally it's the vacation resort name/location. In this example the only administration is called DEMO - Nikki - Texel Beach Stays.
​

After pressing saving the channel, Datatrics will use the Booking Experts channel to retrieve accommodations and conversions.