δηλοῖ μὴν ὃ ἐγὼ βούλομαί σοι ἐνδειξάμενος, ἐάν πως οἷός τε ὦ, πεῖσαι μεταθέσθαι
it clarifies what I want, showing you, if I can, persuade you to change.
Of which verb is this ὃ the object? probably πεῖσαιwith respect to what I want to persuade you to change.