Overall view of the fuel inlet manifold. Note the flat spot; on an actual thrust
chamber, there would be a fuel inlet here with a flange onto which the
fuel high pressure duct would be bolted.
On this particular test turbopump, I'm not certain where the discharge from the
fuel turbopump was directed. On an actual thrust chamber, 70% of the fuel
would have been directed
down the regenerative cooling tubes comprising the thrust chamber, but of
course this is a truncated thrust chamber
(and many tubes have had sections removed).