To connect your JBL speaker to a soundbar, you will need to determine how the soundbar and the speaker are capable of connecting. Here are some options for connecting the two devices:

1. Bluetooth: Many soundbars and speakers have built-in Bluetooth capabilities, which allows them to wirelessly connect to each other. To connect the two devices via Bluetooth:
* Put the soundbar into pairing mode (consult the soundbar's manual for instructions on how to do this).
* Put the JBL speaker into pairing mode (consult the speaker's manual for instructions on how to do this).
* On your phone or computer, go to the Bluetooth settings and scan for available devices.
* Select the soundbar and speaker from the list of available devices to establish the connection.
2. Auxiliary cable: If your soundbar has an auxiliary input (usually a 3.5mm jack), you can use a 3.5mm auxiliary cable to connect the JBL speaker to the soundbar. Simply plug one end of the cable into the auxiliary input on the soundbar, and the other end into the auxiliary output on the JBL speaker.
3. Optical cable: If your soundbar has an optical input, you can use an optical cable to connect the JBL speaker to the soundbar. Simply plug one end of the cable into the optical input on the soundbar, and the other end into the optical output on the JBL speaker.

I hope this helps! Let me know if you have any other questions.