Heljan class 45 cab lights issue

[Pendle Forest]

I've fitted a Hattons 21 pin 6 function neo decoder into a Heljan class 45.  I've had to remap the lights at end 2 as I'm using a Gaugemaster Prodigy controller and they were on function 2 which is non-latching.  I've moved them to F3.  The head/tail lights now work correctly.  I can't find anyway to get the cab lights to work though. Does anyone know what CVs I need to remap to fix the problem?

[96701]

Hello Pendle Forest from a bloke born in Nelson. I have a model of Heljan D64, so no headlight and is fitted with an ESU decoder which works as per the Heljan manual that came with the loco and am using MERG kits for command station and booster, so cab lights are on F5 and F6. I'm afraid I have no idea about the behaviour of a Hattons 6 function decoder, it appears that the ESU has AUX1 and AUX2 on pins 15 and 14 respectively, therefore cab lights on F5 and F6. Hope this helps.