I stripped the insulation back on one side, carefully bent that leg around to make a spear and stuck that into the plate. That one leg can ground to the plate as long as the second leg is well insulated. Mine seems to be working well, but you will need to be careful to keep it from sticking out of the top when you apply your buildtak.
Hi macgyver03, On the heated build plate: Do you have some photos about how the thermistor is installed? I don't quite get your suggestion regarding stripping insulation, etc. At a cost of just $0.55, I bought 2 since I've destroyed thermistors in other installations (like assembling the E3D hotend). Which wires in the kit did you use to solder to the heated bed? Since the solder points are in the front of the Eclips3D, the wires have to be long to reach the power supply.