Do these use the factory mounting points or require drilling?

These mount at the factory rocker points — no drilling needed. The attachment uses OEM locations, so installation is straightforward bolt-on.

Will I need to reprogram anything for the sequential signals to work?

The sequential module is integrated into each headlight. Installation method and any required programming or calibration steps are not specified — test-fit and verify function before full commitment to the mounting hardware.

Do these come with wiring harnesses or connectors?

The assemblies themselves are included. Wiring harness compatibility and connectors are not specified — confirm your vehicle's existing headlight connectors before ordering or have a wiring diagram handy during install.