Yes you can hook it up to the that circuit, but the other 2 gauges are lighted just fine. So if you lower the lighting all together, now the lighting is poor in the dash, and poor on the 2 gauges, and the EGT is okay... . not a good resolution.
Further, it's not just the brightness, the EGT gauge is FRONT LIT... . in other words, the whole gauge lights up. Where, on the other 2 gauges, they light just like the Dash lights... . BACK LIT only through the numbers... ...
Big mistake by Di-Pricol in my opinion... . not an acceptable mistake given the price they charge.