Injector connectors
 

I got rc 440 injectors model number sl9-0440, and just want to make sure that the connectors i need are

NipponDenso Male to EV1 Female - Fuel Injector Connectors - Bosch Electrical Connectors & Denso Connector Adapters

these ones before i buy the wrong thing

You can find the connectors for *much* less money in the "help" section at your local parts store. Of course, you'll need to cut n splice, but that's pretty easy.