Open up sArena.lua, go to line 82 and line 85(ctrl+g), you should see
"ArenaFrame.classPortrait:SetPoint("TOPRIGHT", ArenaFrame, -13, -6)"
"PrepFrame.classPortrait:SetPoint("TOPRIGHT", PrepFrame, -13, -6)"
change the "-13" to "-130". That should move it roughly to the left of the bars, slightly spaced out. You can just modify that value to move it around on the x axis to suit your preference. I've only test this with it on Test Mode on the interface options and didn't look at any of the other code so I can't promise this works in arenas.
if you're really lazy, heres the sArena lua file, just replace this with yours... http://uppit.com/irs...ibhe/sArena.lua
Here's a SS of what setting both to -130 looks like, just to make sure this is what you were wanting...