Found my leak now I have a question.

I was laying in bed last night wondering why this happened and I had 2 thoughts. First I thought the previous owner had something in the basement that shifted and hit the pipe causing it to snap. The other thought was "Is there a strain on the pipe when the kitchen slides in and out?" I crawled into the basement and put my hand on the end of the ABS waste pipe where it connects to the flex hose that goes up to the sink. I had my wife open the slide and as it reached full extension there was a lateral pull to the right. If the connection was weak it could have been an issue. I may never know. To clarify, the pipe was directly over the opening and at first glance appeared to look fine. I would guess that most of the water went in to the tank and maybe 20% leaked. I twisted the pipe to get a visual of the bottom. Removing the tank would involve disconnecting the shower drain and I'm unsure how to get to it. I'm handy but that will be a big undertaking. I'll have a better idea after I talk to Host.