Help to reboot to recovery

[samnaction]

Hi, I am remotely helping my friend to recover data from his phone. His phone is broken and usb debugging is disabled. So I asked him to reboot to recovery (for adb support )which he cant as the phone is restarting (confirmed this from windows 7 autoplay ) , he was able to boot to fastboot. Now how to reboot to recovery, he is unable to remember which recovery he is on. He is on CyanogenMod lollipop. How to reboot to recovery. Thanks

 

[samnaction]

Finally did booted to recovery but adb says unauthorized. Anyway mtp is listing the folders