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I want to know how to revers the direction of its rotation

You may or may not be able to do so. Look at the inside of the cover over the wiring connection. Reversible motors will have a schematic there. BTW -how many lug connectors are in there.

It has 3 I beleave

No diagram on the connection cover? Find out which lead is hot and leave it alone. Switch the other lead to the unused terminal and try it.