You don't need a 4 pole connector for the amp. That's only there for assistance in case you have 2 speakers on a single 4 pole speakon. The diagram on the back is sort of confusing. But the output A is a 4 pole and the output B is a 2 pole.
On output A, 1+ and 1- run Channel A.
On output A, 2+ and 2- run Channel B. <-- This setup is in case you have a 4 pole single speakon to run your 2 sets of speakers.
On output B, 1+ and 1- run Channel B. <-- This is the same as the above but for standard 2 pin speakons 1 per speaker set.
The way you've wired it is the only way you should wire it if you're bridging your amp into 1 channel. In this case, Channel A and Channel B are combined, and you use output A 1+ and 2+.
Standard 2 pole speakon connections for 2 channels on the amp would use 2 2-pole speakons where:
Speaker1 goes to output A, 1+ 1-.
Speaker2 goes to output B, 1+ 1-.
Hope that helps.
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