Just started to install mine. There are four standoff cable ties holding cables to chassis tubes. If your careful the standoff parts can be re-used with normal cable ties.
There are also plastic P clips each side supporting leads as they come out of igniter box and which appear to be pop-rivetted to chassis cross tube. Will drill out rivets tomorrow and re-rivet P clips on new leads assuming they will accomodate the 8.5mm leads.