How to connect my experiment with unipark?

Hi,
i created an experiment using Psychopy Builder. I uploaded it an it works fine ( with all the fabulous help i could get here ).
Now i try to connect my Unipark Survey to my Experiment.
Piloting the Study I noticed, that you are asked to fill in a session-number. Is there a way, that it automatically takes the running number of my Survey from Unipark and starts the Experiment right away (so it is not possible for the participant fo mess up the number?)
And how do I reconnect the Experiment back to the Online survey so that the participant is still in the same session of the survey?

Hope you can point me in the right direction.
Lisa