1. Connect the amplifier to a speaker cabinet of the correct impedance.
Connect 1 x 16ohm cabinet to the 16ohm speaker output jack socket.
Connect 1 x 8ohm cabinet to either of the 8ohm speaker output jack socket.
Connect 2 x 16ohm cabinets to both of the 8ohm speaker output jack sockets
No. Those two 8 ohm outputs are in parallel, so plug one 8 ohm cabinet into one 8 ohm output, and plug the other 8 ohm cabinet into the other 8 ohm output.
Alright. New question. I can wire this cab in series to get a 16ohm load, and then run both it and my Emi Legend 1x12 16ohm out of the (2) 8ohm outs. Right?

That's my intention/question. I wasn't going to run them out of the 16ohm jack.
The pic was just to show the outs that I had.