This technical note registers observational predictions for the interstellar object 3I/ATLAS during its passage through the Jovian gravitational regime expected between 16 and 26 March 2026. The analysis is based on the Structural Plenitude Theory (SPT) framework, particularly the predictive formalism developed in SPT v1.3 — Part X and consolidated in SPT v1.4. The document presents a conceptual model describing how solar radiation pressure and localized gravitational gradients associated with Jupiter may influence the orientation of the cometary tail and related observational signatures. The note serves as a timestamped record of predictions prior to the observational window, providing a falsifiable reference for future comparison with astronomical data. No new theoretical postulates are introduced; the work strictly applies the previously established Structural Flux Paradigm to a specific observational configuration involving the interstellar object 3I/ATLAS. This document complements the SPT v1.3 and v1.4 Zenodo series by establishing an observational benchmark for evaluating structural interaction effects during the Jovian approach.