HongsoHigh Pressure Cast Iron Burner Replacement for Round Bayou Classic Cooker Frames (CBBG10N)

What is the spring for and where does it go?

Is it a true 150,000 btu burner? all other similar burners are only 65,000 btu. why your a double the heat output?

Does a threaded bolt come out the bottom? for mounting?

How do you mount it cause my old one has a screw in the bottom that bolts on to the stand enyone help