Well,
1. Grab a cold beer...
2. Put synchro in middle position (neutral), insert spring middle of the hub cage until one little bent end is over the end of the hub cage. Apply inward pressure to the spring to hold it against the center part of the synchro hub.
3. Cuss when it falls out, take a drink and start over
4. While appling pressure to the flat side of spring so it stays against the synchro hub. Use a small flat blade screwdriver to carefully push inward on the non-installed spring end, pushing it over the hub cage.
5. Take another drink, and get ready to start over on spring 2.
It's a good thing there are only three springs... You can go through alot of Beer doing this!
A little tip for the last spring, I found that I needed to apply more pressure to the synchro hub due to the other two stubborn springs giving me less room. I finally moved the synchro hub towards the opposite end of the cage from the end of the spring I needed to get over the cage. It reduced the pressure.
Drink another cold one...