Wedge Anchor Question

Hey y'all. Quick question regarding Red Head 3/8" wedge anchors.

Basically, should I use 2x6 treated lumber bottom plates to allow for anchor bolt placement at a greater distance from edge of the concrete slab to avoid cracking the slab? With 2 x6 I could push the anchors inward to about 4 inches or so. The rest of the wall framing and roof will be using 2x4s entirely.

Shed to be built: 10x12', 8 foot high walls, 9/12 pitch

Slab: 10 x 12', 5-6 inches thick

Thanks!