Just one is a little damaged...there is a bolt underneath the frame that looks like it goes into the BB...guess this needs to come out as well? Never seen that before!
Would be surprised if it did as the cup will be threaded to the end and screwing a bolt into it would knacker the thread. Could just be a drain plug? Take and out and see what happens. If the frame falls apart you'll know it was important :)
Would be surprised if it did as the cup will be threaded to the end and screwing a bolt into it would knacker the thread. Could just be a drain plug? Take and out and see what happens. If the frame falls apart you'll know it was important :)