if you entered it exactly like this
" WAIT UP TO <n> SECONDS. "
then you just added a comment
without the " it would probably end in a syntax error
you just have to write in case of 5 seconds : WAIT UP TO 5 SECONDS.
unfortunately you hijacked this old discussion and just said you want insert this code, without giving any reason.
I actually do not see much sense to insert this code in LSMW conversion step, you are just making LSMW slow, but there is certainly no effect to the batch input which is created after the conversion program is ready.