EASIEST: Get a Nordost Frey cable - they are very good
IMPROVED: Get a one piece harness installed in your arm - probably cost around $600-$700 and it will sound even better than the Frey
THE ULTIMATE: - buy an Audiomods arm - Jeff at Audomods used to make a special mounting plate just for your turntable. His arms are amazing value and significantly better than what comes with the 1200g
You can order his arms with a silver litz one piece harness and have him install KLE Innovations Absolute Harmony RCA’s. This is an amazing combo.
What if you want to change the Harness? - trust me you won’t - it’s that good!!!
Once you get the Audiomods arm, you sell the arm that came with the SL1200g and install the Audiomods arm.
I purchased an Audiomods Classic (Series III) arm several years ago with the Silver litz harness - added the Absolute Harmony RCA’s myself and have never looked back. A friend purchased the Series V for his 1200 and loved it
By the time you sell the old 1200 arm you will probably have spent around $800 total - but the sound will be superb.
Just make sure you check the compliance of the cartridge matches the arm first - or you'll have a cartridge upgrade to factor in.
Just thinking outside the box
Regards - Steve