Didn't find other posts mentioning those keys, so I sent them to the mail address
MKB20_v77_Arcane_-_League_of_Legends_-_Season_1_5032.tgz
MKB20_v77_Arcane_-_League_of_Legends_-_Season_1_9444.tgz
MKB20_v77_Arcane_-_League_of_Legends_-_Season_1_C482.tgz