Sorry for giving bad news, but you have to have a skilled job AND provide the details of it, supported by the Employer's Supplementary Form, as part of the requirements for being granted residence under the Skilled Migrant Category, even if you don't want to claim any points for it (or could make the 160 threshold without). It's here
https://www.immigration.govt.nz/new-...-visa#criteria, as one of the criteria (under the heading
Skilled employment). Also see SM1.5 g, here.
https://www.immigration.govt.nz/opsmanual/#66762.htm Points for employment in New Zealand are necessary in order to get residence, rather than the SMC job search visa.