Can anyone tell me how to fix this I opened it and not I can’t close it again

You didn’t do anything wrong. This is good for you to know in case of a flat. You’d have to click that open to get the tired thru.

Regardless, I’ll try and explain as best I can – you’ll want to squeeze the “arms” together, (you’ll notice the brakes on the wheel will open/not grip the wheel) so that the black rubber thing on the right fits into the silver thing in the left. There should be a grove on the silver thing where the cable comes thru, but not allow that black rubber thing to come thru.

Hope this helps.

Also I don’t know how to properly run the brake line either I’m still figuring that out and I haven’t put the chain on completely I had to assemble everything about the trike so it’s taking me a while