I have a 2015 Model S with a manual rear lift gate (I do wish we had paid for the powered lift which is now standard). The lift struts are really squeaky, so I've ordered some replacements that appear to be easy to install. However, the bolts they attach to are incredibly rusty, so I would like to replace them if doing so isn't complicated. I don't know how to identify the correct parts, find them, and most importantly if replacing them is easy for me to do myself.
Here are photos of the bolts in question:
Here are photos of the bolts in question: