The area you must be most careful is attaching the ring lugs to the controller. Please make sure the bike has been turned off for at least 20 minutes to minimize the chance of there still being zappy juice in there. Between Brandon, Terry, me, and others in our immediate circle I remain the only one who has not shocked himself working on these bikes so far but I'm sure it's coming eventually. I suggest a socket wrench so you minimize chance of shorting any terminals against each other.
The other thing is I am informed the controller has soft metal inside, so only tighten things down to about 8-10 ft lbs of torque. Snug, but don't treat it like a tire lug nut or anything.
We strongly urge people to remove that inlet. It's dangerous. We've had 2 create arc flashes and one literally ejected itself at high speeds into the shop wall. If you need to plug into walls we have adapters for everything.