The SAP rockers do not attach with all the same clips as the stock rockers, only some of them. They use the existing OEM lower screws and screws in each wheel well, and the black push/screw plastic pins under the door weather seal, but they do not use the white clips along the rear quarter panel. You should use the double-side tape on that rear quarter section, to keep the smallest gap possible.
Hoping Ski has a copy of the instructions, else, they actually may not exist. The most recent eBay seller of NOS rockers did not have instructions.
Fairly certain all SAP gear were US/Pontiac market only. All of the SAP components were specifically stamped either Made in Great Britain or Made in Austria… that is how you know you have OEM SAP gear. I've updated the first post of this thread with this key authenticity/identification info—it's been discussed numerous times on other SAP threads, but important to have in this archive.