You will need a lot of parts to build the original glow system, like temp sensors QoS controler, some relays.. etc. The best for you will be aftermarket glow system, or if you want to do it in very easy and simple way use one button which goes trough relay and then direct to this plate of the glow plugs. In this way just keep the button for 10-15 seconds when it's cold and then start the engine and release the button. You can also think to advance the timing on the pump when its cold, again it can be done by a button or a switch (it will no need a relay in this case).
Here you can read about this time advancing:
Cold-Start Device - CSD (Automatic)
There are different types of automatic CSDs available for the VE injection pump. One popular type is the vacuum-operated CSD that uses a vacuum pump, water thermo valve, and a dual-stage diaphragm located on the injection pump, Figure 24. The thermo valve, Figure 25, applies vacuum to the diaphragm(s), depending on coolant temperature. (Figure 26 shows which diaphragms have vacuum applied at various temperatures.)
Another CSD, called the KSB (a Bosch designation), advances injection timing by controlling supply-pump pressure. A KSB control valvemounted on the side of the pump overrides the pressure regulator, increasing supply-pump pressure and advancing injection timing. For example, if the temperature is below the set value of the temperature switch, the switch closes and the KSB solenoid switches on. This increses pump pressure. Above a preset value, the temperature switch opens, the KSB solenoid opens, and the pressure regulator now controls supply-pump pressure.