Need some help please fitting a Hornby Black 5 TTS sound decoder to a Hornby Black 5 loco.
Hornby loco and Hornby sound should be straightforward enough but not for me it appears!
Pic01 last screw to take out before removal of tender weight
Pic02 speaker fitted into the tender well, pickup wires and DCC socket wires run in a channel underneath
Pic03 only 1 point to secure the speaker, pillar on the left, however there is a gap and existing screws or screws supplied are not long enough.
Pic04 replace tender weight, I very much doubt it as there is no way to secure it and the decoder hasn't been fitted yet.
Oh and the adapter ring doesn't seem to fit anywhere either.




So is it me being simple or are Hornby actually complicating things of what should be a simple install.
Has anyone done this before and can you advise how it needs to be done and if you have any pics to show.
Link to gallery for bigger pics
https://postimg.cc/gallery/jph4cveu/
Thanks