i bought a black single pod boost gauge pillar mount from nomad and they said it requires 1 screw no drilling needed. but when goin to fit it i noticesd there isnt already a hole behind it and there is a square hole about in that position for the screw from the old yellow clip things from the standard pillar. any1 fitted 1 and how? and wot gauge has any1 got coz could do will help wit wiring the light as there is bout 5 wires??