I removed the print head cleaning carriage assembly that slides fore and aft on the right side of my hp 5520 printer. After cleaning the plugged black ink tube that is attached to it, I’m ready to install it. PROBLEM: There are 2 springs on this unit…one on the side which I reconnected. The other is a smaller (weaker) spring that goes on the bottom of the unit. I see where the one end of the spring attaches but cannot figure out where to connect the other end. Any help would be greatly appreciated.