Typically you’ll position the mixer in between the two turntables. / sarcasm.
Either buy a flight case for the mixer or buy some foam pads to put under the mixer to raise it up. Or take the tts out of the flight cases when playing.
I could be wrong, but you might be able to buy add on ears for it. I know back in the day, they used to sell them for the 500 and 600. After that, I just never really payed attention.