You insert a small flat blade screwdriver to depress the lock tab and push it out. Look at the new onw you are going to push in to get an idea of how it locks in.I not talking the fuse box inside the car by the emergency brake. I talking the wiring block on the engine firewall that would screw into the fuse box. I need to fix the blower motor wire that was cut but not sure how to get the terminal out of the block to fix the wire. Does it just push out?