Yikes!! That means either you or brec has some wires crossed.
I verified that the Target 4.1 Help Cable Guide does indeed specify CS44 (Phonak Version) 058-0255 cables (meaning CS44a). The same cables are listed for both AudeoQ/Quest and AudeoV/Venture.
Hmmmmm; I’m wondering if brec’s cables that he thinks are CS44 cables are actually CS44a cables…
CS44 cable + DIY adapter would work for Phonak.
CS44a cable + DIY adapter would NOT work for Phonak.