There were a lot of adapters out there for different vehicles and speakers. I never found one that I could use. Mine is for a 2017 300h, but should be the same for the 350. I also cut it down so it would fit on my 254mmx254mm print bed.
I used these connector adapters off Amazon and they were plug and play.
RED WOLF Car Door Speaker Wiring Harness Adapter Connector Plug Replacement for 2000-2019 Toyota Camry 4Runner Tacoma RAV4 Scion, Subaru 2012-2019, Mitsubishi 2002-2020 4PC (you only need 2)
The author marked this model as their own original creation.