YES!! Especially when You're seeing a Flashing Red Light! And while Backing-Up in Tight Spaces without a Spotter.
...I would take that Drivers Mirror off, UGLY in My View, and throw it in the Trash. That thing looks like a 'Bill-Board' on the side of the Freeway, It's Huge!
Obtain a pair of 'BABY Californian' Mirrors (yes hard to find), the Most Beautiful, Eye Appealing Mirrors for the Pantera, in My Opinion. And the are more Streamlined.
Drill the Holes in the Passenger Door, and on Both doors. Be sure to install Nut-Serts for a Stronger, more Stable Mounting. And then you may use Stainless Steel Allen-Head Machine Screws. Course Threads as Fine threads can't handle the dirt and will Gaull and Lock-Up
...GLUE a Mis-Matched Mirror onto the Pass 'A' Window, Really?? When that's finished You will Not be Happy with it!
Before the Desert Trip, I installed a Camera with-in the Shell of the Passenger Californian, beside a Convex Mirror. Viewed on the 11" Monitor. One of two cameras, this was for the Blind Spot.
The best Mirror in My Opinion. The Monitor is showing from the 2nd camera on the Rear Deck Lid.
MJ