volts or watts (never both)

This is my 2nd post and unfortionately it's another noob question. I am using the Geekvape tsunami mech mod and was wondering which way I am ment to put the battery in (if there is a correct way)? Which way is the safest? Thanks.

:) this is the “Next Generation” of the iTaste MVP v2 Owners Group thread that was originally started by KnurledNut just a fun “owners-group” for peeps that love the MVP Taste it, Love it ~ Innokin ~ LEADING THE FUTURE please participate, be nice & have fun… …the MVP Owners...