The project My Samples is where you will place your samples. In addition, it also has some pre-built samples.
First, remove the Kicker instrument from Beat+Bassline editor.
Open up My Samples (icon on left-side panel), and choose the latin subfolder. Drag the first sample to Beat+Bassline editor. Do the same for the second sample. Now the Beat + Bassline editor should look like this:
After making the patterns in the two editors, exporting the file to wav, we can open in Audacity.
The first file is the result, while the 2nd and 3rd are the actual samples in the LMMS folder.