Looking for some ideas on how to install my dahua ipc-hdw5231rp-ze with the pfa130e junction box. My soffit has an existing electrical junction box from the wiring install. I put the PFA130e over the existing jbox and it doesn't quite cover the existing jbox. Any ideas how to create a water tight seal? Im wondering if I should have purchased the square dahua junctionboju instead of the round?