How to connect rescue parachutes to Ava Acro Base?

Hey guys,

I recently got a 3-rescue Version of the Ava Base and I'm still trying to figure out how to connect my two square rescues.

The harness itself comes with one reserve-line connected to left/right shoulder. There I'd like to attach my square rescue. I have not yet found any other attachment point for my second rescue, which would be steerable...

I do not want to connect booth reserves to the same line as an opening would also trigger a (partitial) opening of the second rescue...

Has anyone figured out how the harness is meant to be assembled in a secure/proper way XD??

Thanks for any hint and hopefully see you again soon....

Lukas