研究以下这种装置，可以从后视镜接电，省了走线的麻烦，但似乎跟车型有关

https://www.amazon.com/FitDVR-Adapter-Chevrolet-Cadillac-Rearview/dp/B0D4V4MF22/ref=sr_1_4?crid=C4CUIADMXLIZ&dib=eyJ2IjoiMSJ9.39vVpDMzaIxYsTj-RbsW1n6Bk6c78Uy4FhOWEXBtmYyYURil7j4oOAqh4uhSc_YtziisN-9e8UfSV261ueT4ofDmthHcM8Av9H0kCwd6t5aLe2Rgq6u0NnsW_5H1Hwy77HS5zSSU1pdfD9t2Y22m5uh4gfXZBqXIGOhuJOHL1Aji3Jw3WurFwUuJNBludNrL0F53GLw97-2qpIEPADu1VxSYafjKgb6EQbixCxmJ6yR9ZY0XiY1k9xzOYwe40XDL62ANhH7pCt69i3_YuyUYMvuoTjgQQ5yxfHtDqMFIxq4.EH8Vz1B_XEBcv6-93nClkVpq-yPYJLOq3yclUp_Uq4I&dib_tag=se&keywords=fitdvr&qid=1775682889&s=electronics&sprefix=fitdvr%2Celectronics%2C273&sr=1-4