Not sure what this is for. Theories welcome.
amkatya, g-gigliols, emkei, vlad1611, weleasewoger72, lazybuddha, clickiemcpete, deprofundis, ishifishy & why-yu.
It looks like they're going to put up some kind of post or tower, fixed onto the 4 bolts. With the pipes in the middle for electrical cabling. That's my theory. :D