SRX? I forget if both have oil...I have had almost every Manitou fork every made...wait, I have, except the Skareb, I skipped that and am waiting for a new R7 in August...Some early Manitous did use oil on one side...I'm surprised the instructions aren't clearer. I'll go download them and see what I can tell you. I've worked on all my Manitous since I bought my first set - Manitou I's, the grey/silver ones from 1991.
I'll get back with you shortly.
jv