How do you remove the cover on a gen 1 box?

I need to remove the front cover of my gen 1 rachio that is mounted inside a weather proof box but not sure how to do so.

I found this video but it is marked as “private” so it’s of no help:

any help is appreciate, thanks.

Just grab the cover and pull. Shouldn’t take much force for it to disengage from the backing plate where the wiring is.