the red-white-yellow are RightAudio-LeftAudio-CompositeVideo sets. however some TVs use component video which uses Red-Green-Blue connectors, and that red is not the same as the other red.
Specs on the TV says it has a digital audio out but not what kind. It has optical or RCA. Either way you will need a DAC like this one and cables. http/www.parts-express.com/parts-express-dac-digital-to-analog-converter-%2851-compatible%29--180-999
This is a fixed output so you will need to use the volume control on the Kenwood. You can turn the internal TV speakers off or turn the TV volume all the way down.