68 GTX Rear Axle Bearing Help

So it looks like it has a suregrip. I put the drums back on made a mark at the top of each drum and spun the passenger side a quarter of a turn clockwise so the line was now closest to the front of the car. I went to the other side and that line was also a quarter turn also facing the front of the car . Then I loosely put the wheels on so I could see them both and they were going the same direction. Now I’m worried about the thrust button falling out and am unsure what to do then or even how I would know that so I might take it to a rear end shop here in town.