Zevahim 54: The Place for the Beit HaMikdash

The southeast corner of the altar didn't have a base - but what does that mean? Was there no physical base or does it mean that the base there couldn't be used for the blood? Perhaps it's because of the divide in the property in the portions of Yehudah and Binyamin - where the sacrifice had to be done in Yehudah's portion. Also, the selection of David and Samuel of the place on the hill upon which the Temple would be built - as among the highest places around, "between the shoulders."