Don't know if this helps: On our Citation (similar to Synergy), the table support is post with a metal tab that screws in and out of the end. The tab fits in a slot in one of the 2 floor plates, then you turn it clockwise (usually about 1/2-3/4 turn) until it is good and snug. If that metal tab gets screwed in to the end of the post too far then it won't catch and lock in the floor plate. Likewise, if it's too far out, then you can't get it to tighten.
Tom & Kathy & our Goldendoodle, Sandy
2017 Thor Citation Sprinter 24SS (Diesel)
2014 Honda CR-V FWD, Blue-Ox Baseplate, Roadmaster Falcon 2 tow bar