You need to take off the back panel and remove the backplate, which has those standoffs you see poking through the holes, attached. Then that pushpin style cooler can pop through those holes IF it says it supports that socket type.
Being honest though, those pushpin, three heat pipe style, low mounting pressure coolers are a waste of money and time. You are not going to see a significant difference in thermal performance over the stock cooler you currently have. If you are replacing it only because the old one failed, then that's one thing, if the price is really cheap, otherwise you'd be well served by going with a cooler that can actually take advantage of the fact that you already have a metal backplate installed and can install a high mounting pressure four or more heatpipe cooler that will do much better.
The real question though is what will your case support. All of this doesn't matter if the case won't support a tall enough cooler for any of these to fit.
Since this is a proprietary Acer case, I'm not finding any specs on the maximum CPU cooler height that it supports. You are likely going to need to find that spec on one of the forums via some forum scrubbing/searching before we can know for sure what coolers, including potentially even the TX3, will be supported.