There are three ways to do this. The first is to swap the solid axle in the hub for a hollow one that will take a quick release skewer. You will have to rebuild/ re-pack the hub to do it, as well as acquire a skewer axles run about $10 to $12, and the skewer another $10 to$15 in your LBS.
The second way is to locate wing nuts that will fit the existing axle. These wing nuts can often be a bit flimsy and difficult to find. The last way is to use quick releas converters:
https://www.google.com/shopping/prod...fJ6Bm8Q8wIImgE

Or:
AXLE RELEASE CLASSIC M10xP1.0 | Store | Axle Release

Which to use depends on the threading on the hub, metric or English. It is probably the second or Metric version.