Hi Emmet, Are those lights more fitting to the US models?
In Australia we only have those lights as parking/corner lights only, single bulb and 2 wire connector. None of ours have amber or indicators incorporated, just the big amber bumper lense and side markers in the guards/fenders. So I would believe that each model (country specific too) has a wiring loom specific to what is released there. Might need to return or have someone fabricate wiring to suit. Might be able to find a wiring connector that matches it from another model vehicle at a wrecking yard.
As there are many variations in this corolla over the years I also can see that its hard to get the right parts. Good Luck