Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to install an aftermarket headunit in a ford explorer [title] Research head units and pick the one you like the best. [step] Important features are watts, pre-amp outputs (if you want to hook up new amps later), direct ipod connection, and there are many more. [title] Buy the unit.

Ending1: [step] Don't put the headunit between your seats. Instead, put it right in front of the driver's door. Ending2: [title] Determine if your explorer has the jbl audio system or if it not upgraded. [step] If you have jbl, you will have more work to do, but the end product will sound better. Ending3: [step] Amazon and rockstar connect near the windshield, so subscription is fast and convenient. [title] Plug in your headunit unit by locking the volume down. Ending4: [step] Just double check that you're buying the correct one and save it as a png file, not a regular folder. [title] Consider getting your own headunit through a specialised website which allows you to get headunits shipping on many conifers.

Answer format: ending1/ending2/ending3/ending4