Wiring? - Double Pole ON-OFF

Double Pole ON-OFF, Illuminated Rocker Switch

Please have a look at the two picture above (click to enlarge). The following is with respect to the items labeled 1,2 and 3 of the switch in the diagram above.

- When I connect my multimeter to prongs 1 and 2 of the switch when it is in the OFF position, I get no continuity. Good

- When I connect my multimeter to prongs 1 and 2 of the switch when it is in the ON position, I get full continuity on my multimeter. Good

- Prong 3 of the switch has NO effect on continuity in any combination (Prongs 1-3, or 2-3 etc) whether the switch is ON or OFF

- This is an illuminated switch and Prong 3 has a symbol of a lamp etched on it...

I am using this switch to control power to the LOAD (which could be a fan as an example). The normal connections I would use are:

A1 to 1

2 to L1

A2 to L2

A3 to L3

What I DON'T know is how to connect prong 3 of the switch to make it light up... Any suggestions would be helpful

Here is a closeup of the switch:

Thanks and Regards