This is going to be a dumb question, I'm sure. But i bought my car used so no owners manual. But where is the low pressure valve located? I have a 2006 suzuki verona and I can't seem to find the low pressure valve to recharge my a/c. I think it's in the back towards the firewall. But I'm not positive.. and I don't feel like blowing my body apart from an exploding can so that's why I'm asking. And if it makes a difference, it's the base model.