You could keep on using Meanwell. Set it to 14.1 and don't touch that tiny pot.
I attached to it a pair of old crocodile cables from (defunct) charger. And a cord with plug from the same charger. Secured cables to the slotted case with those tiny plastic-covered wire tie-downs that you get on coiled cables with new appliances etc.
Added a 4-digit voltmeter, $2 - can't trust it much, just to make sure that I didn't move the pot incidentally. Those cheap meters are hit or miss, this one was a "hit", another one a year ago at 3 times the cost was a "miss".