Solar Panel Charging Cables

I currently own an AC70 with a 120W panel I just ordered a 200W panel. The cables that come from Bluetti including the cables that connect into the AC70 to charge it, are 16 gauge. I want to up the thickness to 12 gauge to charge quicker(?) and more efficiently. Is there any way to buy a charging cable pre made to do this. Both panels are Bluetti, I’m also a newb just getting started.

My thinking on the thicker gauge wire is this: the panels connected in parallel at 12 ga. will be just fine until it feeds into the 16 ga. wire, starting a bottleneck and will be a waste of time and money.
Thanks

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