I think this thread is a smutty little troll....but I'll bite...
Whether you use 2, 4, 3, 7... whatever....all straps should vector into the chock...if not the system is statically indeterminate and thus more prone to coming loose.....
BTW...I once heard TB mention that Pete in assless chaps was the only wheel chock he needed, and the straps were optional....more like a Baxley I guess......