Your question does not tell us much. Change what to a bit file? The source? The destination? Both?
Typically in real world applications, the destination would be a bit file and then you would map those bits to hte real outputs. That way, you can add logic to deal with things like machine modes, (AUTO / MANUAL). Or the opportunity to rearrange the order without having to edit the whole source file.
If that is what you need, just change the destination to a B file word. Then use bit instructions to move those bits to the outputs
Example
XIC B3/0 OTE O:0.0
XIC B3/1 OTE O:0.1
XIC B3/2 OTE O:0.2