You mean the air horns inside the airfilter housing? They are air horns but also make sur that the housing does not split when the nuts are tightened. Some VW also use these airhorns and you can them form places like classiccarbs although I don't know if a plate for a 40IDF will also fit a 44IDF.
(cannot attach photos some here are links)
https://www.historicmotorsport.net/shop/used-parts/engine-used-parts/pair-of-weber-44idf-carbs-on-pinto-manifold/
https://classiccarbs.co.uk/wp-content/uploads/2019/09/52848.003-1.jpg