Can someone tell me what these connectors are for? Under passenger seat

Captain obvious here.... definitely not Porsche.

Any sign of an Amplifier ever being installed in the Frunk or Trunk? Even then, maybe too large gauge (small) for that?

Has an aftermarket radio but no signs ob an amp. Strange

Those are factory connectors that were part of the seat belt interlock system.

they are in the right place but too new and white looking and a bit different as well. What is the blue on the cable?