Begg said while the drop back in distance at Caulfield last start was not ideal, he did not want to step her up in distance as he felt it may make the mare 'dour'.
With Nash Rawiller in the saddle, Splash Back railed up late and finished off well.
Jordan Childs, who scored on the mare at Moonee Valley, is back aboard on Saturday.
"I thought she ran very well at Caulfield," Begg said.
"I didn't want to run her over the mile beforehand, as I thought it might make her a bit dour, so that's why I kept her at 1400 (metres) just to keep a bit of spring in her step.
"We thought she ran very, very well, but we thought at that stage of the day it wasn't the best part of the track to be in.
"He also got dictated to where he was in the run, so overall it was a good performance."
Splash Back had been a steady riser through the grades since joining Begg's team last year, going from a benchmark 70 race to being successful at Group 2 level.