Your post was exactly what I was looking for!
I have been struggling with the setup of the ZHC5010. I simply want the four physical buttons to be linked to four switch items, and I want them to be synchronized no matter if I press the physical buttons or GUI buttons. Therefore, I tried your second suggestion. I couldn’t make it work until I tried config values without the quotes which did the trick for me. Maybe it’s some layout thing (I’m on Danish). I used:
{group_4:[node_1_1]}
{group_9:[node_1_2]}
{group_14:[node_1_3]}
{group_19:[node_1_4]}