If you're talking about the white 3 pin connector behind the battery, no, that is the plug for connecting the F1 diagnostic tool to adjust ECU settings and do diagnostics.
For heated grips I used power straight from the battery with inline fuse.
For a GPS or USB connection, I use the wire behind the dash cover just under the rev counter.

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2014 XT660Z - Barrett pipe, DNA stage1.5, Barkbuster hand guards and handlebars, Pivot pegs, Teknik suspension, Guard-it engine protector combo, B&B rear rack, Trax topbox.