yet another wiring question w/pic

[StratMonster]

I am playing a Marshall JCM 900. I am hoping to finish wiring this cab by the weekend, but have a question.
I was only going to install 1 - 1/4 jack receiver in the back. Not a plate just a single plug in.
Am I correct with this diagram to install 2 - 8 ohm speakers in series for a total of 16 ohms? Then set my head for 16 an let er' rip?
Or....do I need to install 2 Jack receivers. One for in and one for out?

 

[mickeydg5]

Yes, two 8 ohm speakers wired in series like that, for a total 16 ohms, through a speaker cable terminating into a 1/4" mono phono plug will work. Positive connects to tip and negative connects to sleeve of plug. Set your amplifier impedance selector to 16 ohms. Let er rip.

 

[brp]

Be advised though that wiring in series this way, if one speaker blows, the other will not work either and your 900 will have no load.