Given my experience with the TOM’s platform heater connector, I was bothered by having the M2’s heated build platform connection flex as the Y stage travels back and forth. After replacing the Z axis motor, I added a strut to the Y axis stage to stabilize the HBP connector.
This overview shows the aluminum strut sticking out to the rear (Y+) end of the platform support spider:
A closeup shows a quartet of 4-40 holes drilled and tapped along the strut’s midline:
Admittedly, that’s a bit of a kludge, but I didn’t want to drill holes in that nice steel bracket… particularly since I’d have to dismantle the whole stage to get to it. The four screws wedge the strut firmly in position and have jam nuts on the bottom so they don’t loosen.
I extracted more wire from the braided sheath and moved the cable a bit further out at the cable tie holding it to the Y axis stage, then cable-tied the HBP connector to the strut.
With the stage all the way to the rear:
And to the front:
The wires may break, but now the HBP connector and heating pad joints should survive!
The Smell of Molten Projects in the Morning 
Hi,
I recently had the thermistor cable broken because of the constant bending strain when moving the plattform.
Now I just cable-tied the braided sheath containing the cables to (seen from front) right rear arm of the spider.
Now only the sheath bends and no longer the cable.
Hope it helps.
That seems both reasonable and easy!
The spider sits atop those springs, so force applied through the cable may affect the platform leveling at one extreme or the other: run one of the platform leveling test pieces and see if it remains stable.