The basics of installation are the same as the SKS KwikRail:
1. Remove rear sight.
2. Remove rear pin
3. attach rail at the rear sight base with split pin provided
4. Run the KwikPin supplied in the kit to hold the rail to the rear receiver cover
The only difference is that the rear pin can be removed without modification (IIRC a spring detent holds it in place) being necessary so the rifle can be returned to its original configuration.
Reliable ejection can be an issue with placing a rail on this rifle so we recommend keeping scope rings/bases as clear of the ejection area as possible.
We also recommend installation of the included strip of velcro near the back of the built in shell deflector in order to protect the rail from damage from ejecting cases.