FYI Just installed Brace loop for Sirius radio /RDAR loop. After jumping volvo that did not enough crank power to turn over, again. Location of module is located in rear passenger side. Hidden behind the third row seating cup holder compartment. What a pain to take part the plastic panels and bolts surrounding panels. Purchased Brace part number #8688083 from Volvo dealer for $34.00. Took 2 hours to carefully take apart and install Brace. Radio works after install.
Hopes this info helps another owner with battery drainiing ssue. I will wait and see if need to replace a interstate battery less than 2 years old.