Definitely dynabolt to the slab.
We had an eye bolt to the pillar on the front of the shed that the horse would occasionally get tied to.
The brickwork pillar was around 6 bricks wide and 1.5 deep, tied to the trusses and with roller doors bolted to it, so a fair lump.
Anyway, horse was tied to it and decided it didn't want to be there any more and pulled back. The whole pillar moved 6" with a 600kg horse just leaning back on the rope. 1500kg of trailer going for a short roll and pulling tight on the winch will rip the bricks out and leave the house bowing in the middle.