Try to use a hole saw that makes a hole just large enough for you to insert the fitting through the tote.
If you want to do a test run, you could use RTV silicone sealant-I use this on my system. If you let the sealant cure overnight, it will bond to both surfaces. The beauty of using it is that when I want to disassemble the piping, a pair of channel-locks will twist the piping right out of the fitting. A bit of removing old sealant and it's ready to reuse.