DEC PDP-11/70 cabinet setup

[Nigel Williams]

I'm hoping to (partially) recreate an 11/70 setup, at least as close
as I can get with what I have on hand (see the first pic in this
gallery that shows the 11/70 advert):

https://imgur.com/a/pvgUVmg

I don't have the right masthead but I'm wondering if on a real 11/70
there is a 5mm gap between the masthead and the rack blanking panel
below it? I can't see with these pieces a way to close the gap, but
I'm curious as to whether the real thing also has the gap?

thanks.