Fool proof method without any need for force or strength.
Get yourself one of those cheap ratchet straps from wherever, mine were 4 for a tenner and used for many other applications. Tie one end of a thick bootlace or similar to the spring or spring plate to be pulled into place, if it is a double one like the GS LC. Tie the other end to the ratchet strap. Fix the other end of the ratchet strap to something solid. I tied mine to the towing eye on my van parked suitably close.
Work the ratchet and it will pull the spring into place without effort.
This worked first time after trying the penny method, a bucket handle and trying to pull it into place and both failing.