I'm having trouble identifying some fuses in my 1985 Westfalia.  According
to the manual, there are four "Additional Fuses" located at the right side
of the fuse panel:
Rear Window Heating, 8 amp
Rear Window Wiper, 8 amp
Entire auxiliary heater 16 amp
Auxiliary heater overheating switch, 8 amp

When I look to the right of the fuse box, there is a block with a 10, 25,
and 20 amp blade fuse.  To the right of that, there is a block with a 16
and 8 amp bullet fuse.  I assume these are for the auxiliary heater.  I
know that the 8 amp bullet fuse goes to the auxiliary heater switch.

I searched the Bentley and can't find the auxiliary heater fuses in the
1985 Vanagon electrical diagrams.  What are these fuses for?.