Make sure you're trying to remove the sidelight-- if you let your fingers do the looking you may find ( as I did) that you're trying to unplug the (I presume) headlight level adjust. The easiest one to do is on the drivers side, check from the front where the sidelight is and get your fingers round the back, then a 1/4 turn and out it comes. Once you've done it it's a doddle, as much as anything can be a doddle on a modern car.
Alternatively, wait until bob a job week and pay a boy scout with tiny hands, 5p to do it for you !