Printrbot Simple 3rd Party PCB Heated Bed Wire Holder / Strain Relief

Just got my heated bed from 3dheatbeds on ebay installed, and wanted to make sure I wasn't going to expose my power and thermistor wires to unneccesary stress. This was my first print after upgrading -- it uses the same zip ties that are supplied with the 1405 for assembly (qty. 3).

Link to the heated bed:
http://m.ebay.com/itm/251620873437?nav=SEARCH