Template:Stringlist:AppendFieldImages syntax
[%count=] sl:AppendFieldImages[( [Image= string], [FirstOccurrence= number], - [MaxOccurrences= number], [Options= string], - [NullValue= string])]
[%count=] sl:AppendFieldImages[( [Image= string], [FirstOccurrence= number], - [MaxOccurrences= number], [Options= string], - [NullValue= string])]