Fast Marina Magazine

I'm in the process of finishing the restoration of my works Austin 7cwt van. I'm looking to fit some door mirrors. The van never had them from new but I would like the van to be a little more usable
I've purchased a pair of these:
https://www.angclassiccarparts.co.uk/pr ... legro-maxi
My question is where should they go! Before I start drilling Did BL ever release a guide where on the door they should be fitted? I've been looking at various pictures of marinas and the door mirrors seem to move around the area of the 1/4 light.

This appears to be an official Mk2 publicity photo, showing what I assume to be the official factory position for your type of door mirror.

Thanks! Well using various images I marked a position and went for it!

I had a similar type of mirror on a Marina back in the 80s, and the little grub screws that held the "pedestal" to the door mount kept vibrating loose, and needed a dab of Loctite. Not sure if your mirrors use the same system?