Stonehenge Car Park Post Holes 3
Image by Chris Collyer

The calc shows that from all three post holes the sun would seen to rise over the monumnent with the westernmost post hole probably being the best bet for a view of the sunrise over the centre of the monument . That is taking the height of the stones into consideration ,we don't know what was there , if anything ,in the the period when the posts were erected .
Good luck with the pic(s) I look forward to it .

I should have mentioned that ,due to the monument occupying 7 degrees of the horizon it means that from the westernmost post hole the sun would be seen to rise above the northern part of the monument before and after the solstice i.e. approx 3rd December and 9 th January as well as the solstice itself when it is more central .