[padresag]

only the pictured nbr 1 is used . in figure 5- panel and suburban body mount the one with the letter A is actually the "B" pillar insulator which is in the same position as nbr 2 mount in the above fig 4 illustration.
in the fig 5 illustration the separate view "A" is the suburban mounting while the other is panel mounting as the panel floor goes up right behind the seat and the suburban allows for a footwell as the back floor is shorter
ron