Please help me identify these engine bay components

I have two items in the engine bay of my 4R that I am not sure what purpose they serve. I attempted to locate them on a Toyota engine bay diagram, but I suspect the diagram is not current for 2020 4Rs.

The first pic shows a small square fuse box next to the usual large fuse box. What items are are connected to the small square fusebox? I was going to install an OE bracket in this area and fuse block kit here. But now I need to figure out how to navigate around this box, or move it.



The second pic shows a black plastic cover over some type of device, with a hose connecting to the engine. Next to it is the power steering fluid. There is a plastic clasp on the black cover, which I can release, but the cover still does not release. I can't seem to tell what else is holding it on, and I certainly don't want to break it. I would just like to know what purpose this serves.



Thanks for all the expert insights in advance.