Read the PDF I linked to above 
âIndividuals who have paid insurance contributions in more than one signatory state are entitled to a pension from each state in which they have been insured for a minimum of one year.â
If you arenât insured and then retiring with a Swiss (2nd pillar) pension fund, you are not going to get a monthly 2nd pillar pension - only a lump-sump payment. (In practice, since hardly any vested benefits foundation will convert your capital into a monthly pension. They arenât legally required to. Even if they did and you had lots more in capital, it would likely not be worth it)