For other models, there will be a tension area with a check spring holder located near the front bottom of the machine instead of a tension knob.
There are hidden tension discs in between this knob and the machine, and you will need to wrap the thread around the bottom of this knob to insert it in between these tension discs.
For most models from the Kenmore 158 series and 385 series, there will be a tension knob at the bottom of your first thread path.
Draw the thread down the A path, hooking it into the latch at the bottom of the path, and back up through the B path at the left. The front of your machine should be marked with an "A" path and "B" path, or with equivalent labels.
Wind the thread down the front of the machine and back up again.