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Did you download and read the manual for Offworld Station Booster Pack? If not, you can find it here:
https://cdn.akamai.steamstatic.com/steam/apps/2236140/manuals/ows_user_guide.pdf?t=1683888467
It tells you how to set up snapping to work with the pack.
BTW - The link to the manual is on the Steam page for the pack under "View the manual".
Intel i9-10900K 5.10GHz, 64 GB RAM, Nvidia GTX 1080 ti 11GB, Windows 10 64-bit, dual monitor display