I was also too excited to let them sit in the box, and installed the new wipers and wiper arms yesterday.
It is an simple procedure.
1. Remove old wiper arms (mine had a cap on the top that needed to be removed first to expose what I believe is a 10mm nut. Take off nut. I put a number of microfiber rags down surrounding the arm. Using a regular screwdriver I gently pried the arm off the assembly).
2. Locate position of new wiper arms and blades on windshield,
3. Use a small file to file a bit of a flat spot on the wiper threaded post,
4. Install new arms
I still need to put the slight bend in the arms, similar to the restoration photos I snagged off Wilhoit’s website. (Attached)