hello i have a question if you are so kind

i want to do a 3d spline between 2 points of 2 diferents sketchs. I want to creat a variable name for every point of the two and do a line or spline between them with a guide equation (using this vars created)

does someone knows how to do it?

thank you very much and best regards

Edu ​​​​​​​3DEXPERIENCE ​​​​​​​