Help Unlock bootloader without volume buttons (buttons broken)

[welpxd]

I tried to unlock the bootloader on my HTC One [m7]. I've followed all the steps on htcdev.com. I managed to skip the manual (vol. down + power) way to get in to fastboot using adb. However, I'm at step 10 and I'm stuck. If my volume buttons are working, all I have to do is press vol. up and then select "Unlock bootloader".

Is there a way to get past this?

Steps I've done:
1. adb devices
2. adb reboot bootloader
3. fastboot devices
4. fastboot oem get_identifier_token
5. fastboot flash unlocktoken Unlock_code.bin
6. select "yes unlock bootloader" .... T.T