Not sure myself they do differ depending on pins as it is hard to see in pic but the terminal looks like it will exit from the rear of block (wire end) as the block molding stops it coming out, my guess is look in the other near the pin & contacts for the tang to release from the block.
Try pushing down the top part of the pin nearest your thumb on the terminal to remove in pic 1 & lightly pull on wire.
Try pushing down the top part of the pin nearest your thumb on the terminal to remove in pic 1 & lightly pull on wire.