If you have CPP there are specific functions s to use for the load percentage or status. You just need to look those up.
In BP, you have other ways to do this.
the easiest is to just pop in a delay for however long you think it needs plus another 2 seconds or so.
the hardest is probably to expose the CPP functions for the status of the load to BP and use those.
12:42
answer delayed till 36m in