Traverxec

I have obtained the keys needed for user but am prompted for a passphrase when I try to use them (not the passphrase we crack in the beginning – i already used that to obtain said keys). I have read a lot of documentation on the matter but am still confused and am unsure what exactly I’m doing wrong, and googling hasn’t provided me with any answers, and I have tried using verbose mode but still am confused. Would appreciate any help on figuring out how to use the keys to connect to user.