i installed a shift light on my 98 svt contour.now i need to know how to hook it up i just need to know where the little green wire goes.the directions say hook it up to the ground on the coil.. please help

98 svt
superchip
75mm maf


98 svtc
superchip
75mm maf
punched out cat
autometer shift light
alpine head unit
alpine digital processor
MB quart all the way around
3 12" mtx T-5 series