Damaged digitizer; need to backup phone - computer not trusted

[hantz simon]

plugged in wired keyboard with passthourgh wire that goes to my pc (dont plug in yet)
held home button and told siri to "turn on voice over"
pressed home button.
plugged in passthrough to pc.
When "trust" window pops on ipad, use right arrow to move to "trust"
press Control + Alt + space to select trust

backup/synch to itunes!

voice over kb commands:
http://audiblesight.com/voiceover-gesture-keyboard-commands/

What do you mean by passthrough wire?