This is for 2 x the 3D printed external RCA sockets and 2mm banana socket for ground for Technics 1200 / 1210s MK2 - MK5, pre-made for you.
I just made the modification to my two MK5 1210s and through bulk purchasing had enough RCA sockets etc to make some more.
Includes the 3D print and RCA sockets and Banana socket and colour-coded wiring to match the stylus cables already to be soldered on.
Information available on the internet, but i've done the fiddly hard work already of fitting the sockets to the 3D print.
Just (very gently) remove the back cover on your decks and replace the hard wired cables with this.
Red - Right Inner
Green - Right Outer
White - Left Inner
Blue - Right Inner
Black - Ground