How to repair a loose tweeter speaker

[norar135]

Hello,
I need help repairing the tweeter speaker on my new-to-me 2013 135i. It has come loose and I'd like to know how to reattach it without removing the whole door panel. You can see from the pictures below that the top part of the triangle has separated from the seal keeping it in place. I searched around and found lots of videos and posts discussing how to upgrade the stock tweeters but unfortunately, most of them involve removing the entire door panel (to get at the mid-range speaker). They only show the tweeter being removed/installed while the door panel is already off. I'm slightly concerned about applying too much pressure and breaking something. Any help would be greatly appreciated!! (its driving me slightly nuts, haha).