Changing Tail/Headlight Bulbs?

Hi, I have a 1989 PA with two burnout bulbs, one being the left rear tailight, and the other being the front parking light. My question is what is the easiest way to access the bulbs so I can replace them, especially the parking light as it serves as my front blinker. They both seem to be located behind/under pieces that are molded or screwed to the car making changing the bulbs more difficult than it really should be. Thanks for any help

To access the rear bulbs: In the trunk, pull back the liner material behind the lens. The lens unit is held on with six wing nuts.