This maybe old school, but I've always secured the kickstand side first then crank the right side down, pulling the bike straight, vertically. Compressing the shocks, but not bottoming them out. I leave some travel room for the shocks. This has always worked for me.
These days, i think some. Are going for a lower attachment points that don't compress the shocks. Also, the newer front chocks are more advanced and lock the front wheel in place and holds the bike vertical pretty well. The back end only needs to be secured from left/right movement and from a lower point that dosent compress the shocks. This seems to be a lot less destructive on the suspension. These cool chocks are not cheep. My two cents.
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