Taking a break from my repainting projects and rewiring some old lionel 027 switches. I have 4 1122 switches, two are 1122 with 5 notch housings, two are 1122(e) with 3 notch housing. The 1122(e) clearly house a light bulb to light the switch. On the 1122 with the 5 notch housing I see no place for a bulb? Were these not light like the other ones or am i just not getting it?