Hi, that's not the right way. On each speaker there are four plugs as you call them. They are binding posts, now 2 will be + ve and 2 are - ve. You have to first connect the two positive ones using the supplied jumper or if not use speaker wire. Now both positive posts are connected to each other. Repeat the same for negative terminals.
Then from the AVR connect the positive and negative terminals to the corresponding ones on the speaker. Take care that nothing is shorted, in other words positive and negative wires should not touch each other.
After doing it don't switch on immediately, take a break then recheck the connections and switch on the AVR with 20? volume and test. You should be able to hear full bodied sound from both left and right speaker. Once you are convinced that all is well you are free to increase the volume.
Hope this helps
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