- Ok. Look for the 2 wires that supply the power of 4 batteries.
- Recognise which 1 is positive and which 1 is negative. Usually Red is + and Black is - . (+) is connected to the positive side of the LED, which means the longer leg.
- In your case, your car is using 4 batteries. So, you should use up to 2 LED connected is SERIES!!! Not Parallel. Otherwise you will have to use resistor. If not, your LED will burnt out. I mod the Gen3, so all my LED are connected in parallel with the supply of 2 batteries.
I notice that your avatar picture there has a AE86 with headlight. My cousin's 1 doesn't have it.
Here's the link to the Xmods website. You can custumize your car from there directly and view it with price too.
http://www.xmodsrc.com/
Maybe you can purchase there but most of the cars are already retired. Look for eBay, very big chance that you can get from there.
Feel free to ask me.