You need standard slip eyeball fittings that go in pipes.
https://www.amazon.com/Hayward-SP1421DBLK-Opening-Hydrostream-Insider/dp/B003SQYIYC/ref=mp_s_a_1_6?crid=3OH8EOU5AWZT3&keywords=slip+eyeballs+for+pool&qid=1686260954&sprefix=slip+eyeballs+for+pool%2Caps%2C123&sr=8-6