It is not recommended to cut and splice antenna wires as it can impact the performance of the antenna. It's better to use connectors or adapters to extend the length of the antenna.
You can purchase an antenna mast at most auto shops like Auto Parts or Auto Zone. Many gas stations or garages will also carry the antenna mast for your car.
go to NAPA auto parts and buy an antenna adapter
at a salvage yard & some auto parts stores ----- if you omly have a hole you can get a splice kit at auto zone
i am pretty sure if you want an antenna on your Mitsubishi Eclipse i would recommend you go to a auto shop or a place where people customize they're cars
You can buy a butt splice kit from the auto parts store, it will consist of different size butt splices and the crimping/stripping pliers. Choose the proper size butt splice, strip a length of insulation off each end of the wire to be joined roughly half the lenght of the butt splice, put the wire in each end of the splice and crimp. Once the connection is made wrap the splice with electrical tape.
One splice that would work is a western splice.
That will likely vary depending on the model and year of manufacture. Also you can find "Universal Replacement Auto Antenna" online or at any discount parts store.
The long splice, the short splice, the end splice, and the eye splice are probably the most commonly used types.
splice is supuraisu
A short splice will nearly double the diameter of the material, but will be shorter in length and not as strong as a long splice.
Splice was released on 06/04/2010.