71 Duster carpet 4 speed

Just finished my 4 speed swap, and need to install the carpet I bought from rock auto... Just their generic one but made sure it was for 4 speed... I assume the shape is different for the tunnel hump?

Anyway, need help getting my head around install.

Do I cut out the shifter opening but it lays on the lip where the boot and trim screw into?

The stuff i bought from Brewers came with boot, trim ring, and two sets of screws.

Does the boot screw down through the carpet to the tunnel and then the trim ring over top also to the tunnel?

Sorry I am bad enough with mechanics but can figure it out, but interior stuff is an enigma to me.

Any pics would be amazing!