The grant is the lowest vessel on the left side of the photo. It sits below the MLT and collects runoff. HB scale grants tend to be quite small, the really big ones are a couple gallons. Mine is my trusty old 9gal boil kettle that I've fitted with a bulkhead and an old ball valve--it's comically oversized by HB standards. The pump on the floor in front of the grant then sends the runoff to the right, up onto the stove top, and into my boil kettle.
Previously I ran off my wort into my boil kettle then hefted the 8-9gals in the kettle onto the stove top. I didn't enjoy doing that operation when I was in my early 20s (even then I knew it was stupid), so this is a big advancement for my hooptie brewery and a concession to the fact that I'll turn fifty in a few months.