Not quite that easy I'm afraid. Basic steps are:You mean slide it out so you can get to the pot, but don't disconnect it - run it and turn the pot while measuring the voltage?
1. Remove AC and DC power from the unit.
2. Remove the top front panel (that covers AC breakers) and and disconnect AC and DC power leads to the charger unit.
3. Remove the charger unit and place on bench.
4. Drill out the rivets that attach the top cover.
5. Remove cover, pot is at rear of circuit board.
6. Apply AC power to the unit and set to desired DC voltage.
7. Reattach top cover with sheet metal screws and reassemble everything.
Sounds complicated but it's really only a 30 minute job. There is a large range of adjustability but I can't say for sure whether you can get up to 14.6 volts.
Also, if size is a consideration you might also look at the Iota DLS chargers which have a smaller form factor. They are heavy duty units that will provide rated output without breaking a sweat.