Blue square: valve (I guess to release pressure at the end)

Green square: cables going to the pump, valve and bottom compartment.

Red circle: outlet of the pump. I think the translucent hose on the right side is a overpressure release (as it goes back into the water tank). The thinner one on the left goes into the heating block.

Pink circle: heating block. I measured 50Ω across it (230V/50Ω = 4.6A -> ~1060W). Probably different for a 110V version!

Blue circles: heating switches (regulate the two different temperatures for coffee and steam)