M/T just hitch up an go. Only the A/T requires a battery disconnect. I'd certainly consider adding a mechanical disconnect (even a simple blade style) since the battery leads don't have much extra length, so it could accidentally make contact while driving.
The Fiesta is super fun! We bought 2! Although 1 has since been totaled, so it was replaced with a Focus ST.
2000 Ford E450 V10 VAN! 450,000+ miles
2014 ORV really big trailer
2015 Ford Focus ST