aftermarket gauges into light switch

Trying to wire my aftermarket gauge lights into the light switch. I have 5 total. The gauge lights are all wired in parallel into one circuit. The lights themselves work fine when wired into the spade in the fuse box that feeds the lights. Problem with that is that they're on all the time since there is no switch in between. Orange wire on the back of the fuse box that feeds the lights didn't seem to work either, not sure why, didn't pursue it. Anyway...

There was an empty slot in the connector for park lamps so I put the connector in there. The gauge lights worked but only with the switch in the park position, not the full on/headlight position.

So any ideas on how to add this circuit to the light switch and have it function like the rest of the lights? I want them to come on with the switch in both positions - running and headlights and be able to be dimmed with the instrument panel lights.

Thought also about using the map light as a separate switch but that didn't work either. Again, didn't pursue why, just tried it and no dice.

No problem splicing into any light switch feed wires, just wasn't sure which one if that's what needs to happen.

Thanks for any input.