The team's media officer, Toyin Ibitoye, told Completesportsnigeria.com at the team's hotel on Saturday morning that Rohr joined the team on Friday.
Meanwhile the home-based Eagles had their first training at another ground on Friday but will have their second training session at Stade d'lamite by 4pm.
The Benin team will train at the match venue this morning.
The game comes up on Sunday, August, 13th 2017 inside Stade d'lamite.
The return leg comes up in a week time at the Sani Abacha Stadium in Kano.
The winners over the two legs will qualify for the 2018 CHAN in Kenya.