For my oil temp gauge a unscrewed the stock oil pressure sending unit (it's right above the filter) and installed a three way splitter. Then I was able to reinstall the stock sending unit as well as add aftermarket oil pressure and temp sending units.
For the other two gauges you mentioned I just use my aeroforce to read those parameters while driving.
For the other two gauges you mentioned I just use my aeroforce to read those parameters while driving.