This is the connector for my a/c pressure switch on my 07 Mazda 03 2.0l. Anyone know how to get it to disconnect?

 

Release the lock tab and slide it upwards.

 

Typically you have to squeeze the end of the lock tab on the plug (like a little lever) to get it to disengage from the clip. They can be a PITA if you have not done that plug type before. In your picture it looks like it is on the side opposite your light. Squeeze it towards the wires and the plug should pull up.