Your citation, the Book of Concord, includes a part that is explicit on the point of the second, spiritual mode being the one for Christ's body's Presence in the Last Supper's elements:
Secondly, the incomprehensible, spiritual mode, according to which He neither occupies nor vacates space, but penetrates all creatures wherever He pleases [according to His most free will]; as, to make an imperfect comparison, my sight penetrates and is in air, light, or water, and does not occupy or vacate space; as a sound or tone penetrates and is in air or water or board and wall, and also does not occupy or vacate space; likewise, as light and heat penetrate and are in air, water, glass, crystal, and the like, and also do not vacate or occupy space; and much more of the like [many comparisons of this matter could be adduced]. This mode He used when He rose from the closed [and sealed] sepulcher, and passed through the closed door [to His disciples], and in the bread and wine in the Holy Supper, and, as it is believed, when He was born of His mother [the most holy Virgin Mary].