Do these bolt straight to my factory fog light holes?

Yes. These mount at the factory rocker and bumper points — no drilling or modification needed. Line them up and bolt down.

What bulbs do I need to buy?

881 bulbs. The housings don't come with them pre-installed, so grab a pair of 881s in whatever color temp you want — standard white or upgrade to yellow for that classic look.

Do I need to wire these myself or do they plug into factory connectors?

Depends on whether your specific car left the factory with fog lights. If it did, check if the connectors are already there under the bumper. If not, you'll need a universal fog light harness and relay kit wired through a switch — standard install for any aftermarket fog setup.