The power supply is at the bottom right, it powers 3 cabinets and more of stuff.
Also note the fuse panel on the lower left side as this is good practice (using some type of fused distribution) when using these larger supplies.
Actually Each panel has a fused distribution point like that. And the fuses are all closely matched for the particular use.
A motion sensor doesn't really need a 10 amp fuse.
Yet more than a dozen motion sensors seem to need a 5 amp fuse.
StevenE