Hey guys new to the forum and i need some help installing a gauge in my 2012 cts v coupe i ordered a gauge to replace the analog clock. the gauge reads boost & air fuel ratio i just need to know what line to tie into for the boost, and i also need to no what color wire is the high side on the o2s. The gauge wants me to wire to the high end of the o2 sensor and also does it matter witch of the 4 i go to? thanks