The placement of components is very similar to that of the 2A3-SE amplifier with the SRPP driver stage.
The ugly grey/silver tape bunddle left of the choke, contains three 1uF/275V-AC foil capacitors connected in parallel. The total capacitance adds up to 2.8uF. This capacitance value is used to adjust the value of the +B voltage. Slight differences in this value make BIG differences at +B. It is wise to approach the right +B value starting with a small value e.g. 2uF and slowly add up capacitance until the desired +B is reached. Duncans Power Supply Simulator can be a great help here!