The data sources have been added, but the data sources need to be connected to the endpoint to send responses. If you recall from the previous topic, connecting units is simply dragging a line from a source unit to a target unit.
Let's connect all the data source units to the endpoint.
Drag a line from the findVariantById unit to the Endpoint unit.
Next, drag a line from the findEngineById unit to the Endpoint unit.
Finally, drag a line from the findModelById unit to the Endpoint unit.
The connected pipeline should look like the following.
To continue, see Map attributes to parameters.