I have had my 87 for almost twelve years now and shortly after getting I installed gauges below the radio because the ones in the dash were not working. Well now I've gone and installed a new circuit board with the intent to get the gauges working again. My problem is I know all the gauges I installed I connected to their sending units. Now this might seem like a dumb question but with the new circuit board how do I connect the gauges? How do I get the oil pressure to the gauge as with the temp and battery?