Right ha ha I am laughing at what I've done

I was taking the battery out of the car to charge it over night and then I shut the boot once I had taken the battery out but I forgot that I had left my keys in the boot.

so here is my problem my keys are in the boot cant get it open the car is unlocked just without power to anything and the battery is outside the car

HELP!!!

 

Apply battery juice to the positive stud under the hood and a ground point. Use trunk button to open.

Then buy a spare key.

 

Can you explain how to do that?

 

just found this video. I haven't checked my S-type to see if the key hole is there but I know the button is