Shiels took Scottish football by surprise when he agreed to join the Gers in the summer, despite the fact they were playing in the Irn-Bru Third Division.
The Northern Ireland international, who was nominated for the PFA Scotland Player of the Year award last season, was accused of lacking ambition and of being motivated by money.
The 27-year-old midfielder, who has retained his place in his national team, has no regrets about signing on at Ibrox and is determined to help them move up the leagues into the top flight.
And he reckons a victory at home to Well in the Scottish Communities Cup at Ibrox would prove that Ally McCoist's side is on the right track.
He said: "Our ultimate goal at Rangers is to get back into the SPL and by beating Motherwell tonight we can show people that is where we belong.
"Motherwell have played really well this season both domestically and in Europe. They have been together for a long time and Stuart McCall has an established first team.
"The league table doesn't lie. They have played the best out of all the clubs in the SPL, haven't lost a game home or away, and deserve to be one point clear at the top.
"They will certainly be hard to beat. But this is a game that we desperately want to win. I think many of the players want to do well against Motherwell to show they were right to move to Rangers. "You have to win every game you play with Rangers no matter who the opposition are and this will be no different even though they are in the top division and we are in the bottom league."
Rangers have come in for criticism recently after drawing with minnows Annan in the league away and being beaten by Queen of the South on penalties in the Ramsdens Cup quarter-final at home.
But Shiels has been impressed with how the Light Blues supporters have remained firmly behind the team.
"Many of our performances this season, away from home especially, haven't been that good," he said. "But the fans have stuck by us throughout it all, through thick and thin.
"I am sure they will turn up in numbers once again this evening and really get behind us."