Specs online don't show a SPDIF output on your TV. If it has one it can be either a single RCA coaxial jack or a Toslink optical audio jack.
If it is optical then you just need an optical cable. You may have to turn it on and the TV speakers off in the TV menu.
If it is an RCA jack then you will need a coaxial to optical converter and cable to connect it to the TV and soundbar.
If the TV doesn't have a digital audio output it does have HDMI-ARC that can be used with a compatible soundbar. It also has a headphone jack that can be use in any soundbar with an aux input.