Welcome Awong50 to irv2.
Here is a link
for one mfg's step wiring connections and down on page #10
for another mfg's wiring for their steps.
The wiring is similar in both systems maybe between the two it will give you enough information to wire yours.
Join us down in the Newmar forum
plenty of Newmar owners to answer your Newmar questions.
Enjoy the forums and do post often.