??? how to flush my ro/di

[vr697getta]

i just got home and i saw that my ro/di was here so i put it together
after i did that i seen a few other steps and one said to flush the membrane through a white tuve
then discard and connect the blue tube
i see the tubes but i don't understant how i would flush it
its a purley h2o optima 75 gpd
i called the number but there are closed i emailed them put i though i woudl try this it could be quicker
thanks roland

 

[vr697getta]

so after looking at it for like 10 more mins i unerstood what i had to do