Looks like I need a little help here.
Although my switch looks exactly like the one you posted Scott, the pinouts on the back are different in layout, I've taken a picture and labeled the pins to make it easier for anyone to explain how I should wire this configuration.
Many thanks for any help.
I'm not an electrician. If you are at all uncomfortable with mains wiring please seek one out and ignore everything below

I can't find a diagram of that switch online. My amateur swag is:
A - ground
b - neutral
c - hot
I believe that C has the fuse inline with it. You can see the connecting bar go to one side of the fuse area and the tab is on the other.
Test these out with a multimeter on the resistance/continuity setting and NOTHING ELSE CONNECTED.
Those 3 tabs should connect each to their own pin on the IEC connector.
Next, pull the fuse and see if it disconnects C from the IEC pin.
Next you have 4 more tabs. Based on the previous post with a similar switch you have connections for the neon light and the switch.
Again, use your meter on resistance and test it out. I'm guessing that F and G are the 2 sides of the switch. Meter from F to the other tabs and you should get connectivity to one and only one other tab or none at all. If none at all, flip the switch and test them all again. Should be one and only one.
My guess is that doing the previously mentioned step will yield that F connects to G and only when the switch is on.
Based on the really small leads you can see on D and E I suspect this is the lamp. Back to the multimeter. D should connect to E with some resistance or nothing at all. E should connect to D with some resistance. Neither D or E should show continuity to any other of the tabs. Depending on the type of lamp used you might not get any resistance or continuity between D and E. As long as they don't show connectivity to anything else we can safely proceed with careful testing.
IF all of the above proves itself out in your testing I think the wiring you want is:
A - connect to the ground in your in-cab wiring setup.
C - connect to F
G - connect to E and your in-cab "hot" wire in parallel.
B - connect to D and your in-cab "neutral wire in parallel.