Rennie told glasgowwarriors.org: "We've got a couple of games to go until then. Ulster away will be a challenge, then its Edinburgh in the 1872 Cup. It's good to get the job done tonight though, and it's great to know that we'll be coming back here for the semi-final."
The win over Connacht means Warriors finish with a 100% home record in the regular Guinness PRO14 season, but it was a performance that left Rennie and his coaching staff slightly frustrated.
"It was a good first 45," said Rennie. "We couldn't get our hands on the ball in the second-half, especially with countless scrums and so on down in the corner. There's a bit of frustration around because of that, but we defended it well.
"We felt like the referee wasn't rewarding us for our work after the tackle, so we basically had to stop contesting at the breakdown and work on our line-speed, which I thought we did well.
"I thought we attacked really well. Our possession and territory game was strong, and we earned quick ball as a result.
"We picked up three tries in the first half, and that was probably the game."