WARNING: This page is about a different car, the 2024 Audi SQ7, 2024 Audi Q7, 2023 Audi SQ7, and 2023 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Removing Inner Insulation
Courtesy of AUDI
-- Push the antenna wire -2- in the mount -1- all the way into the tool head.