The black PA66 nylon housing is free-hanging (in-line), so it's meant for harness runs, not panel mounts.
Sizing the Wire and Terminal
Because this housing ships empty, the procurement line item is incomplete without the crimp socket terminal. The Junior Power Timer series typically accepts 17-20 AWG wire with the appropriate contact — confirm the wire gauge against the terminal datasheet before committing the BOM. The 2-position count is the smallest in the series, so it's a common choice for a single power pair or a signal circuit where space is tight.