Forward happy to make a move to Parkhead...
The two clubs were thought to have had a co-operation agreement that now sees the hitman switch allegiances to ply his trade for the Bhoys. Ruelas is reported to be on a season-long loan at Parkhead, with a view to a permanent move next summer.
The 19-year-old revealed that he has already spoken to Celtic's Efrain Juarez about life at Parkhead.
"He [Juarez] is a good person and he is aware of everything and fortunately he speaks English," said Ruelas, according to Sky Sports.
Concerning his transfer to Celtic, he added: "I'm very happy, I am a little rushed with the news as overnight I have been told I am going to another club."