Japanese to Spanish Tech/Engineering Mechanics / Mech Engineering suministrador de papel

I have a translation (the control panel of a paper feeder) from English to Spanish that has been previously translated from Japanese (at least, that's what I think) to English. I don't know if the term "posture" is an accurate translation (I don't know a word in Japanese but "posture" doesn't make much sense here, I guess). Can anyone help me?

上側平行姿勢　外側　使用
Use upper side outside parallel **posture**

Thanks a lot!!!!