proclip or the floor mount.

I prefer this one, but it does wobble a bit

https://www.amazon.com/RAM-RAM-B-316-1-202U-Universal-No-Drill-Aluminum/dp/B00470U9QO/ref=asc_df_B00470U9QO/?tag=hyprod-20&linkCode=df0&hvadid=167136837346&hvpos=&hvnetw=g&hvrand=12145955701228033674&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=1014959&hvtargid=pla-227227889761&psc=1

mounts to floor seat bolt.