Installing a aem wideband to my power logger. I know the white wire goes to pin 1 on the I/o connection and the brown wire is ground. In Eric's diagram he grounded it on the ecm case. My question is am I able to ground the brown wire which is 0-5 volt analog negative to pin 4 or 6 on the I/o connection? Which is ground but the directions state that those pins are only used in special circumstances to ground an external 5 volt sensor. And if I can not ground there can someone explain why.