Replacing heater blower motor resistor in Holden (Opel) Astra 1997 TR ?

The car is a 1997 model Holden (Opel) Astra TR with a 1.6L SOHC engine. The resistor (and pollen filter) are not in the engine compartment and having removed the glove box, passenger side lower panel and passenger-side heater ducting its location is not obvious. I think I can see the clips on the pollen filter housing but this is directly behind the centre console housing the radio / heater controls etc and higher up than the heater controls. This location also appears to be different to that shown in the Astra TS service manual. Any suggestions?

Ammech
November 2009