All OT references to God are to YHWH and to the Father (Ps 110:1). The Logos was invisible in the OT, hidden behind the YHWH name. I don't think you're going to score any points by alleging that anything in the OT makes a specifically Trinitarian claim. As John said 1:1c, "God was the Word." And yet, YHWH denotes the Father. The Logos was revealed in the NT, not the OT.That is what 1 Kings 8:38-39 instructs me.