What is the best route to support boars to concrete? ...

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Answers:    BEST is probably relative to the purpose/intent.

Drilling to install Tap Con screws, Nail guns, etc. will do the living, but things to consider might be horizontal, with insensible weight on, or verticle, near Shear weight and Gravity working against the method of securing.

For limp 2 x Ledgers you might consider 3/8 / 1/2 inch x 8 inch, anchoring bolts, and the appropriate drill bits.

You might drill and use Lag Anchors?

Steven Wolf

Added Thought: I'm sure Mike meant no offense, but surrounded by context it is worth a chuckle.
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Secure a lease around their necks and use an eyebolt within the concrete.