MK2 Heatbed for Vellemann K8400

My K8400 Printer from Vellemann does good work, but eventhough using BuildTak, printing ABS is a challenge. So I decided to install a heatbed

Material:
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* MK2B Headbed 214x214mm
http://www.ebay.de/itm/Heizbett-MK2A-12V-PCB-schwarz-heated-bed-platform-build-printing-bed-RepRap-3D-/
* Glass Plate 214x214x3mm
* (extra) Aluminium Plate 214x214x3mm
* Thermistor 100 kOhm
* AWG14 power wires for heatbed 0.5m
* AWG18 wires for therminstor 0.5m
* heat shrink tube for isolatin