Not possible as the Technics has its own integrated arm, a fancy magnesium variant of the SL-1200 MkII arm. The Thorens has a late-60s SME 3009. To enable quick swaps I had a Ortofon 2M Black in the Technics and its very similar sounding predecessor, the 540/II in the TD-124. I obviously know the differences between these two well as I've compared them at length. The phono stage is setup load and capacitance wise for the 2M Black, i.e. the dem was likely slanted in the Technics favour. At one point late on I even swapped the SME's arm cable (vdH 501 Hybrid) to the Technics just to ensure the capacitance value was as similar as I could get it between the decks. I also tried the Technics with a old Linn felt mat I have knocking around, and felt that opened it up a bit, but I still preferred the Thorens overall.
If you listen to specs you would prefer the SL-1200, it is quieter, more dynamic, gets up to speed instantly etc, but if you love the way Sonny Rollins phrases his sax lines or whatever the 124 just sings. It just gets the musical message across better.
I don't want this to read as a slag-off of the Technics. It is a very good turntable, beautifully made, staggering torque (you could use it as an angle-grinder!) and simplicity itself to set up and use. It is also totally silent, which an idler deck will never be. I just think the TD-124 is a rather better deck, which is fair as it would likely cost a lot more if made today. In fact I bet mine is worth more second hand than the 1200G new!