If it is like nearly every other car phone of the era, then that 8-wire cable is a connection between the handset and the transceiver, and does not connect directly to vehicle power/ground.

Syncwire Bluetooth 5.1 FM Transmitter for Car – $25.99 (7% off) $25.99 at Amazon. The Syncwire Bluetooth 5.1 FM Transmitter provides high-quality audio and has built-in noise compression.

Easily connect your phone to your ride with this pint-sized gizmo that'll transmit music, ... This $14 Bluetooth car adapter lets you make hands-free phone calls — grab it while it's 45% off.

Besign BK06 Bluetooth 5.0. Even with no power, you can use Bluetooth magic to make and receive crystal-clear phone calls and listen to crystal-clear music. You may connect to two cell phones ...

How it works. The AirFly Bluetooth Adapter is an audio transmitter and receiver that works with Apple, Bose and other wireless headphones. Simply plug the gadget's 3.5mm jack into the headphone ...

If your Bluetooth adapter is up for a replacement, we recommend the TP-Link UB500 Bluetooth 5.0 dongle because of the compact design and USB connection that makes it the perfect option to add ...

This Besign Bluetooth In-Car Speakerphone is able to operate 5.0v Bluetooth and has two 2w speakers. There is a built-in motion sensor that will automatically connect when the car door is opened ...