Two wires is all that you need.
I've had the powerdrive V2 (in 12volt) and never had any issues.
I have a Terrova 24v on my 18 foot alumacraft. I can troll into and with the waves pushing 1.3 SOG for more than 12 hours before the batteries die. My batteries are AGM size 31 Series.

Perform a Google Search with the following and you will get more pictures, tips, and videos than you can shake a stick at: wiring a 24v trolling motor