Smith's quick pass - the main reason the 23-year-old Highlander was selected - and his threat as a ball carrier around the ruck means there is extra time for Carter to release an exciting All Blacks backline or make a dart himself.
"I was really happy with our combination first up," said Carter. "I wasn't too sure how it would go because normally it takes a bit of time to build a combination but I was really happy with how Aaron and I functioned as a mini-unit.
"I realise he's got a great pass and I can use that to my advantage, knowing that I've got a bit more time and space outside me. It's just continuing to learn at training about each other's little traits and as long as we're communicating well to each other then we can continue to improve and build that combination.
"I wasn't surprised because I know what a talented footballer he is and I really wanted to encourage him to back his instincts and not become too robotic and he really stepped up and delivered the ball well but also attacked the line. Another strength to his game is his sharpness with ball in hand and he showed that on a couple of occasions which is good to see."
The All Blacks are likely to again enjoy a lot more front-foot ball than Ireland which will help Smith and Carter, who as the world record test points scorer with a tally of 1267, knows a thing or two about halfbacks.
The return of experienced Leinster tighthead prop Mike Ross to the front row for Saturday's second test will help the Irish scrum but that could be negated by the All Blacks' focus during the week of improving their efficiency at the breakdown.
Carter acknowledged the forwards held the key, something doubly important in the sort of weather conditions Christchurch is expecting this weekend.
"If our forwards step up and get good go-forward ball then it gives the halfback some space. I'm sure the Irish would have learned a bit more about him ... I'm sure he'll be a threat whether they target him or not."
