radio antenna cable
 

im installing a aftermarket radio into my 02 sedan and the antenna radio cable doesnt fit the way it is into the radio so do i have to get something to make it fit or take off the plastic part at the end of the cable?

The answer to your question is the same as the answer to your other questions: Start with the source of your aftermarket part. Presumably, they have engineered their product to fit, in some fashion, your vehicle. The vehicle was not engineered to fit the aftermarket device. Nobody here knows what it is exactly that you are trying to stick into your car, so nobody here can answer your question precisely.

Antenna Issue
 

You need a Chrysler Antenna Adapter. At Crutchfield, it is item number 12040CR10 and costs $12.99.

I love Crutchfield. You spend a few extra bucks on head units but you get what you need to put it in right. And you can call and get tech support with a purchase. Priceless to the amature.