Master cylinder reinforcement plate studs

[mrob]

Sorry for all of the questions about power to manual disc conversion on my 73 Cuda, but I've come across another thing that has me scratching my head.
Look at the attached pic. The topmost studs (see red arrows) come through the firewall and go through the reinforcement plate. Thanks to your help, I was able to find some repro wire brackets that bolt to the plate, but now I'm wondering about the studs themselves. Looking at my Cuda (which has factory power disc brakes), I see the head of two studs, but they go INTO the firewall (not outwards like in the pic). I also noticed that the studs on my Cuda go through the pedal/steering column brace and are held in place by Keps nuts on the inside of the firewall.
So my question is - what do the studs in the pic attach to? Is there another set of holes in the pedal/steering colum brace? Any help would be appreciated.
Thanks!

[mrob]

I think I found the answer to my question. I was at Moparts and stumbled across a thread about a guy restoring a 71 RR as a FAST car and he posted some pics of the car during the resto.
So it looks like the pedal assembly/steering column brace is the same between power brake and manual brake cars, except for the upper holes in the brace. On manual brake cars, there are captive studs in the upper holes, but on power brake cars, those holes are left open. I believe the holes are open to allow the studs on the rear of a brake booster to come through the firewall and bolt to the brace.
Hopefully, this may help someone else that is converting from power brakes to manual brakes like me.

[mopardave]

http://www.rosevillemoparts.com/product_info.php/p/firewall-wire-harness-clamp-package-1971-72-b-body-1970-74-e-bod/products_id/5839

These are the pieces that go onto the studs. i beleive they come with the nuts as well