Wayne Pivac’s side drew 20-20 with the Pumas in the first of their two back-to-back matches at Principality Stadium in what was a see-saw encounter.
Argentina lost Juan Cruz Mallia to a first-half red card, but they led 20-6 at one stage before Welsh tries from Will Rowlands and Tomos Williams turned the tables.
One area of focus for Wales in training this week has been retaining possession when attacking inside the Argentina 22 as Jenkins acknowledged.
“It’s tough because we almost think of defence and attack as being the main coaches here, but there’s been a lot of work for Gareth Williams in terms of that contact area,” he said.
“It probably needs more emphasis than the two usual areas for the opposition that we’re playing because we weren’t happy with our contact area at all.
“I think we lost way too many balls in the 22 when we were attacking which pretty much stopped our momentum.
“We had enough chances and I think one of our main things from the weekend is the opportunities that we missed in terms of attack.
“It was a frustrating area for us because we knew it was coming.
“We knew how strong they were in that area, they’ve got some very good threats over the ball, and they certainly delivered but we’ve got to do better this weekend.”
Jenkins continued: “Argentina are a team who are comfortable defending.
“We saw in the Tri Nations games against Australia and New Zealand they are comfortable defending and kicking to conserve energy.
“So, you’ve got to be aware of that and our speed to the breakdown and our accuracy there has got to be better.”
Wales have 13 of their best players unavailable this summer due to the British & Irish Lions tour of South Africa and injury.
So a series win over a strong Argentina side who are at close to full strength would represent a real success for head coach Pivac and his team.
“It’s tough for us because as coaches, we want to win every game,” said Jenkins.
“Sometimes we have to take a step back and look at how many we have got missing and what we’ve built in this short space of time for three weeks.
“I think it will mean a lot if we win, but I think at the end of day we’ve probably done our best in putting this group together and exposing boys who’ve probably been on the periphery.
“They have got used to playing at that level against a top international team in Argentina who’ve had a good performance in the recent tournaments they’ve been in.”
