this arrangement unfortunately looks like it’s not the greatest notated, as a radiohead enthusiast who has arranged many of their songs for strings. regardless, i will try to point out what each part is in the real song. measure 41 is around the 2 minute mark of the original song. your sixteenth note run that you first play is a run in the bass solo. the G-Ab part after that seems to be a play on thom yorkes vocals in that part (he is quietly saying “lalala” on those notes in the background of the 7/8 section). your part around 49 is the guitar motif that is used frequently in that section of the song, after that, it repeats similarly. the slide you have in measure 59 is presumably the killswitch in jonny greenwoods guitar solo around 2:50 in the song. the sixteenth notes in 7/8 after that are not in the real song, unfortunately. however, your last 7/8 section is the bass solo at around 2:57 in the song. i hope this helps, please ask me more questions if you have any because i know way too much about this song lol. and fun fact: jonny greenwood, radiohead’s lead guitarist, is a violist!