The L1300 is nearly identical to the L1840. The worm screw holds the head without a couterweight.

The Durst literature refers to the bellows and lens stage as the "Camera" and the negative carrier and "Head" fit on top of that.

The "Camera" does not come off the column.

You should be able to "head" off with the 4 bolts like the L1840. The negative carrier also unscrews and the mixing box comes out.
The control console and power supplies all unplug.