Whammy wobble

Oops, I broke something. Hi, btw. I'm new to the Jaguar, and am very inexpert when it comes to guitar maintenance... I thought the tremolo arm was a bit loose on my newish Jag, so tried to tighten it by turning it a bit. It hit some resistance, then flopped completely. Something seems to have come loose. It's still attached in some way, because it doesn't lift out, but rotating it doesn't tighten it back up.

Is anyone able to advise on what I should do to rectify this please?

https://reddit.com/link/1i1w1w5/video/3e3ff70gf5de1/player