Haha! Good idea. IIRC the one on mine is 0.8 bar or something shit, oil pressure is meant to be 3 bar at 2000rpm or something lol

Here's a diagram for fitting the lights on buzzer from the earlier models

The radio supply can be found on pin 30 of the speedo need to be this supply as this is the one that dies when you remove the ignition key, door switch on pin 21 and sidelights on pins 26 & 27