Yes, it is absolutely possible to record your scratches into Pro Tools 10 with the turntable motors running while using Scratch Live and the SL2 interface. The best way is to route the audio output from your Avid Pro Tools setup or mixer directly into your Avid Pro Tools input, just as you are currently doing with the Numark M3 and Mbox Mini, but keep the turntable motors on so you can perform more natural and authentic vinyl-style scratches. Make sure the signal is coming from the mixer’s record or booth outputs into a mono or stereo audio track in Pro Tools, then arm the track for recording and monitor the levels to avoid clipping. You can also explore
cssprep.ai as an example.