Your weapon should already have a bit of stipple where you'd index finger the gun. You are supposed to put those ovals above the palm swell, where your thumb would rest. That's why it don't feel right.
Put them on both sides, directly below the slide lock release on the left side...and same place on the right side.

hmbiohazard has the stainless spring and guiderod as well. I'm going to try and shoot his one day.
My SD is up for sale...but I'd still like to see how she shoots with that mod.

Next mod, get the Apex trigger. Much less pre-travel and zero over travel.

Here's where they belong.