Audio Note DAC Kit 4.1 - Board Orientation; 5687 Filament Wiring

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Board Orientation
The above pictures show the correct installation of the new 5687 line board into the chassis.
5687 Filament Wiring
There are two pairs of filament wires coming from the M2 power supply boards. Each pair connects to one of the 5687
valve bases. One wire from each pair will connect to pin 4 and the other to pin 5. It does not matter which color from each
pair connects to which pin but it is a good idea to be consistent between the valve bases as to which is used.