Thank you for your question.
In an EBAE-Nemeth environment, the correct transcription of "Connected3" is ⠠⠒⠝⠑⠉⠞⠫⠼⠒
It is tempting to think that Nemeth Code §77 (about non-use of a subscript indicator when a numeric subscript follows a letter) applies to this example. However, since the word "Connected" is not "an abbreviated function name or a letter which has a separate identity", NC§77 does not apply.
Again, thank you for your question; it certainly struck sparks in my brain!