Changing 1966 cadillac deville tail light bulbs?Where do you access the bulbs to change them.?

I can see the bulbs up underneath but there is very little room.How do you change these bulbs without trying to get your hand up and under the bumper?|||SOMETIMES FROM INSIDE THE TRUNK PULL THE LINER BACK AND HAVE A PEEK...|||a 1966 Caddy probably has screws holding the lens on, take a look and if it does just remove the screws and then pull the lens off to access the bulbs, if there are no screws, you will have to access the bulbs from inside the trunk.|||as with nearly any car from the sxties you have to remove the whole assembly and remove th screws in the back which hold the colored lenses on