This housing ships empty — the note on the line is explicit: Contacts Not Included. The housing accepts the Power Key series crimp contacts; the termination is a standard crimp operation, so the build process is straightforward once you have the terminals in hand. Factor the terminal order into your BOM line from the start — the housing alone does not complete the circuit.
Mating Half and Harness Fit
For field service, the yellow colour is a practical cue: if you are tracing a harness in a cabinet or under a dash, this housing stands out against black or grey connectors, reducing the chance of a mis-mate on reconnection.