Remember that there are 4 pins required to secure the upright pieces to the base. One was missing and needs to be replaced. Tractor supply will have them. One was bent a little. We only put 2 of those in to hold it together for hauling. Get all 4 installed before you use it.
In one picture, the cow has her head between the bars that do not move. That is generally not good. If she were to get her head hung in there, she will pull the chute over. Possibly/probably getting injured in the process. I would not give the cows access to the chute unless someone is there. Generally, the chute would be in a barn or shed (out of the weather) and the cows would be in the pasture. Generally, the cows would be put into the chute only when you want them in there for a short period of time and someone was there to watch over things. I would leave the movable vertical bar open when not in use (top of the bar swung toward the outside of the chute making the middle space as wide as possible. When the cow to be caught goes in the chute, she needs to put her head/neck into the open middle slot. Then slide the movable bar toward the cow. The spring load latch on top will keep it from opening back up. Until you release the latch. That type chute is generally for cattle with a halter on. Generally walk the haltered cattle into the chute. Person stays outside the chute on left side, pass the halter rope around the rear upright and then through the center opening at the front, closing the movable bar onto the neck of the cow as she follows the rope through the center opening. Then tie the rope lead to the steel ring on the top front.
If you use it to bring cattle into without a halter, I would tie a panel on each side like we discussed. Or get someone to weld some steel pipes on each side to prevent the cow from going over or under the single side pieces on each side. And get it anchored down, especially if they are not haltered.
The floor I installed are heavy boards, but not treated. If the chute is going to stay outside in the rain, I would replace the boards with treated plywood. Otherwise the boards will rot out.