Player weights 4.6 weights vs attributes

speed is most important to 4-5 positions, but I'm probably going to ask a dumbass question:
speed in weights vs speed in attributes?
lets say RB.. speed is 80...
weight for that is ball carry ,speed, Break tackle 100
and Fumble =50 how does 50 add to the attributes
Attributes: Speed (100); Carry, Break Tackle, Avoid Fumble (50)
Analysis: The big four. There are some attributes we could talk about here, but they are just flavor if you have the big four. I recommend having a minimum of 75 SP on RBs, but I've seen players get by with less. weighta to the whole player,Team??
speed at RB?55

HERE IS QUESTION
how does Weights apply to the ATTRIBUTES number
say speed of RB = 85 did the weight help the RB speed get to 85?? I hope I have made this clear. as this question has driven me to drink!!