What I find works in addition to large amounts of flux is to apply a very small amount of solder to the tip of the iron, then some of the solder onto the RAS line. This intermediary step helps to further diminish the amount of solder at the eventual joint at the Strong Arm pin. Then hold the end of the wire to the proper pin and briefly touch the iron to the end of the wire where the solder is.

I just think it's easier to transfer a small amount of solder from the tip of the iron onto the RAS wire then to take it directly to the wire and pin.

Stu