Baptism at Ephesus?

There is now some scholarly consensus that 1 Timothy 6 alludes to baptism at Ephesus.

1Tim. 6:11 ¶ But as for you (Timothy), man of God, shun all this; pursue righteousness, godliness, faith, love, endurance, gentleness. Fight the good fight of the faith; take hold of the eternal life, to which you were called and for which you made the good confession [AORIST tense indicates a specific event--Timothy's baptism?] in the presence of many witnesses. In the presence of God, who gives life to all things, and of Christ Jesus, who in his testimony before Pontius Pilate made the good confession, I charge you to keep the commandment without spot or blame until the manifestation of our Lord Jesus Christ, which he will bring about at the right time—he who is the blessed and only Sovereign, the King of kings and Lord of lords. It is he alone who has immortality and dwells in unapproachable light, whom no one has ever seen or can see; to him be honor and eternal dominion. Amen. 

Here we have a possible allusion to Timothy's Baptism including confession and commitment. Since 1 Tim was written in Ephesus, we have here evidence of baptism at Ephesus maybe in the Baptistry of the Basilica of St John. The "presence of many witnesses" may include the congregation at Ephesus.