As per my previous post, the Christian Democratic Party, headed by Fred Nile, did rather well in the State election for the Legislative Council (the upper house, for which this was a half election, ie, half the seats vacant).
Per Jo Tamar at Hoyden About Town, the Lib/Nats nominated the CDP as their Second Preference Group, meaning that in a situation where someone had to be removed from the Lib/Nat ballot due to death or disqualification, all Lib/Nat preferences would flow to the CDP unless the voter had specifically directed otherwise.
In addition, and with, I think (I’d have to remind myself how preferences flow in that counting system from a successful party, but I believe they do flow) considerably more influence on the result, per Tally Room, the Lib/Nats also directed their voters to actively (ie, not just in case of emergency) direct preferences to the CDP, per for example these election leaflets: How to Vote Liberal for Goulburn, How to vote Liberal for Strathfield. Under “Step 2 (larger ballot paper)” these leaflets show a large “1” against GROUP A LIBERALS/NATIONALS and a smaller “2” against GROUP F CHRISTIAN DEMOCRATIC PARTY (FRED NILE GROUP).
In at least some seats, see Shellharbour for an example, the CDP directed both lower and upper house preferences to the Liberals/Nationals.