Does it mean that there is a security risk if I solder the Red cable to vcc pin, the black cable to gnd pin and then input 4 AA batteries to the battery holder? Are you talking about damaging the battery or the battery holder?Some batteries are hard to tin on their metal surfaces, in order to solder on wires, often needs a big iron and flux.
Possibly damaging the battery.
Look here,
https://www.ebay.co.uk/sch/i.html?_...holders.TRS0&_nkw=AA+battery+holders&_sacat=0