Cannot find any instructions on change gearcase oil. All I see in manual and web is only needed after 300hrs/3yrs. I’ve done for other motors so just wondering if its typical 2 screws with vacuum type thing but trying to see exactly which 2 screws it is (bottom looks obvious but top one not so)?

Evinrude Etec 40h, model E40DPLSRC, serial 5054420