Most people connect the 4700 Ohm (4.7 KOhm) resistor across the body pigtail connector - same as sticking a bent paper clip into a wall socket. Insulate/waterproof well.
If you're anal and want to be able to restore the car to its original suspension someday, hit a junkyard and cut off all 4 strut/shock electrical connectors from the strut/shock to the body harness pigtail. Solder the resistor across the strut/shock pigtail, insulate well, plug it into the body connector.
Any 4.7 KOhm resistor will work - 1/2 or 1 Watt carbon or 3, 5, 10 Watt wirewound or metal film.
Radio Shack or the PartsExpress website.
If you're anal and want to be able to restore the car to its original suspension someday, hit a junkyard and cut off all 4 strut/shock electrical connectors from the strut/shock to the body harness pigtail. Solder the resistor across the strut/shock pigtail, insulate well, plug it into the body connector.
Any 4.7 KOhm resistor will work - 1/2 or 1 Watt carbon or 3, 5, 10 Watt wirewound or metal film.
Radio Shack or the PartsExpress website.