Shelf and multisession question (how to pass counterbalance routine values between separate Pavlovia studies)

Hello everyone, I have not found other post that seem to share the same issue (apologies if I missed them!).
I am trying to do a multi session-study by using Prolific+Pavlovia.
In the first Session, which consists of one Pavlovia experiment, I am employing the counterbalance routine in Shelf to assign participants to either group “A” or “B”. I will then check behavioural performance and invite only a subset of participants to Session 2.
I plan Session 2 to be a separate Pavlovia experiment to avoid confusion with payment/refresh issues etc. The group info assigned to each participant in Session 1 via counterbalance routine is what I want to then pass in Session 2. However, I’m not sure how to do so for separate Pavlovia experiments. Does anyone know how to store and pass this counterbalance group info between different Pavlovia studies?

Many thanks in advance for your help.

You need an additional shelf entry with designer scope in which you save the group assigned in session 1.