[ThePair]

I have the same set-up, took me a long time to figure out the trick.

I swing the bars outward so the chain end is closer to the TV, almost touching the bumper, and lay the lower pin in with the head (top) pin of the trunnion tilting outwards more towards the TM. It seems almost like the bar is being rotated the wrong way, at least that's how I perceive it. If I'm on the right side of the TV, the head will be rotated CCW to position it correctly, and the left side of the TV needs a clockwise position. As I twist the trunnion more upright, the top pin will just fit into its channel and end up in the correct position, then I rotate the chain end back. If I start with insufficient rotation, it won't fit in correctly, so I start again.

As Bill said, now that it's in, you may have an easier time trying to get them out (reverse of above) to get the angles/rotation correct.

I can attempt a video if you still need it, let me know.