1) take shot.
2) put darkslide back in
3) wind film on ready for next shot.
On some I do remember taking my shot and then winding on the film without putting the darkslide back in.
Inserting the darkslide might cause a light leak and wear out the light seals.
If it is an old camera of magazine then there might be some movement between the camera and back that occurs during wind on.
Take a blank picture (lens cap on, dark location) and then wind on in a very well lit location, and see if there is a problem.
If there is a problem... get it fixed or put some electrician's tape round the camera, so no light can get through the darkslide slot or the "gap" between the camera and the filmback.
You could test with a digiback or other film backs.