I am trying to pouplate a tool's X and Y coordinates from a point file and I want to do this in the graphic modeler. -But how do i connect the coordinates with the appropriate field in the Target X and Y coordinates of the tool, in this case when calculating the Upslope Area with a SAGA tool?
the TargetX and TargetY input of the slope algorithm are single values of you need to take these inputs from the vector layer?
If they are single numeric values you can add X and Y as numbers in the modeler and then link the values of the algorithm to them.
From the input parameters you can drag and drop the number parameter and give it default values.
Then you can link the values to the alorithm
Is that what you are looking for?