Please help me out with setting up my turntable!

Hello! I have an AT-LP120 which has a built in preamp as well as a pair of Kanto YU-6 Active speakers which have an integrated Preamp and Amplifier. I currently am experiencing what sounds like a dog whistle from my speakers while they are on the RCA input, however, it's not occurring on other inputs so I know it's something i've done wrong with the turntable. I have both components set to Line as opposed to Phono. I've attached some pictures from the product manuals to give some context as I am new to this and I can't make out what the proper setup of the switches should be.