That said I see Iowa finishing 3-0, Wisconsin finishing 2-1, MSU finishing 2-1 and PSU and Illinois finishing 1-2 so there will be a 3-way tie between MSU, Iowa and Wisconsin for 2nd place at 13-7. In that scenario Iowa is 2-seed.
Not that it's terribly important, but in your scenario, Iowa would be the #3 seed. With no head-to-head tie-breaker for IA-MSU-WI (all 3 teams being 1-1 against the other 2), next tie-breaker is record vs. Maryland, so that would go #2 WI (1-0), #3 IA (1-1) and #4 MSU (0-2).