Replying to How to attach acrylic sheet to top of box?? Please help!

Whatup NS! So I have recently been working on making a box for my backyard. I was going to originally cover it in a few smaller pvc pipes but then I got my hands on some acrylic sheets (plexiglass type of stuff) I read a few threads about how it slides pretty well, so I am just curious how to go about attaching it to the top?

I tried to see if I could take some drill bits and predrill holes (I was pretty sure this wasn't going to work in the first place) but it cracked a bit (like I thought it would).

The other option I came up with was maybe glueing it on somehow? I figured If I did go this route I would need temperature stable/weatherproof glue for the differing temps and moisture. Anywho Anyone else ran into this problem? Or have any suggestions? If you have used glue what kind/brand? I really need to get a solution so I can finally hit it!