There is no correct order of plugging them into the battery other than obvious polarity one.

I have never had an issue with the wiring itself on the bullet plugs but they do require an good solder job for the wiring to be firmly in place. For racing, those are the way to go and what you'll see on the front-runners' cars.

The obvious issue is that it is very easy to reverse polarity on those. My buggy is setup so that the wiring means the wrong bullet can't even reach the wrong plug, i.e. my positive wire can't reach the negative hole on the battery but if that's not practical for you, I'd recommend marking your battery istelf with tape, nail polish, etc. to "shout" the correct polarity at you.

Also, make sure you get "solid" instead of "birdcage" plugs. You want these, not these.

Or otherwise, Dean's plugs really are not bad for a newbie.