Need help with my RM 1000 subs

Iagent

I bought a pair of RM 1000. When looking inside after removing the passive radiator, one of the subs has the two drivers facing the passive, and one has one driver facing the passive, and the other facing away. I'm thinking that the correct way would be the two facing the passive, but wondered if anyone here knew.

I'm also trying to find out what the impedance should be as I am replacing the 6.5" woofers.

Thanks for any help.