when i first had everything unpluged i was also worried to start the car. now after you do it a few times i dont even care to look over the bay cause i know if something was left unplugged know damage can be done. you just get a cel and some times the car won't start or run right.
things the need to be plugged in to start are injectors, coil, ignitor, cam and crank sensors, maf. thats all that need for engine to start really, to be driveable just add tps and your on the road with about 5-10 odb codes lol..
these cars are forgiving so dont sweat it, and checking your timing marks, thats about it. and dont start your car without an checking you installed the oil filter.....