The axis HWP is horizontally polarizing the light at an angle of around 45 degrees. Now to record the intensity over 40-50 degrees and find the exact position for horizontally polarized light.
***UPDATE***
After sitting in the dark and rotating the HWP from 40 - 50 degrees the minimum intensity value is at 40 degrees. (measured with voltmeter). Now to find the exact maximum position. I'm going to look near the 0 point.
***UPDATE 2***
One maximum is at exactly 2 degrees. The second is at 88 degrees.