Load your program, then enter the monitor and use the "
ll" command to
load your label file like this:
You will get lots of warnings and even a few errors. You may ignore safely all these warnings and errors as long as they reference any problems VICE thinks it has with the labels.
After loading the labels, they are used by VICE in the disassembler listing, and you may use them whereever you need to specify an address. Try
as an example (note that VICE needs a leading dot before all labels, and that the compiler prepends an underline under most named labels).