8 3/4 rear end confusion

Without pulling the 3rd member, the way I did it one time was to use some long "magic fingers" to install the left side button with the roll pin sticking out a bit to engage the other button. I then installed the left axle shaft. With that in place, I installed the other button and used a long extension to seat the button onto the roll pin. Then installed the RH axle shaft and set the end play. I just couldn't get a magnet to release the button, so, I had to find another way and I just didn't have the time, gasket, and 90w at the time, or, I would just pull the 3rd member and make life easier.