As mentioned I did some research on the issue of whether the SBC or Baptists in general were Anabaptists or had any historical connection with them. The following is what I uncovered on the matter.
Years ago, when I started investigating Anabaptistica the Anabaptists were still the pariahs of the Reformation. Church History texts relegated them to the inquisitional dungeons of Christendom in the form of an obscure sentence or paragraph generally accompanied by the terms “heretic” or “aberrant”. Now everyone appears to taking on the Anabaptist moniker as mentioned previously principally the Baptists.
Not too long ago Southwestern Baptist Theological Seminary held the Anabaptism and Contemporary Baptists Conference in which the speakers praised Anabaptism and they passionately made the claim that contemporary Baptists were descended from this group.
However, many scholars find very little connection between the two groups in any significant sense. Contemporary Baptists originated from two streams or individuals namely John Smyth (c. 1565 – 1612) and Thomas Helwys (c. 1570 – c. 1615) around the 17th century.
Just because the designation Anabaptist has “baptist” in it that does not signify that, they are associated or originated with Anabaptists. There is not definitive relationship to the “Anabaptists” but the Waterlander Mennonites briefly influenced John Smyth whereas Helwys (Smyth successor of sorts) had reservations about the Mennonites specifically their Christology thus he severed bonds with the group.