Help...deuce master/ booster disassembly

[madden]

hi

need help guys

cleaning/ restoring my 1970 deuce brake booster set up

-removed the brake vacuum booster...no issues
-removed the master brake cylinder.....no issues
-removed the small top support bracket (one with the 1 mounting hole in it)....no issues

-but the large long mounting bracket (one with the 2 mounting holes in it) shown in the first picture.........i just can not figure out how that piece is removed/ separated from the brake line assemble

anyone done this.........if so what gives

some help would be GREATLY appreciated guys....pics if you have them as to how this get disassembled

thanks so very much
regards
chris