Solo 401k both "employee" and "employer" contributions

[KimDole]

There is an option in ITA to include the "employee" deferral portion of a solo 401(k).  However, the rest of the equation is missing, allowing for the additional "employer" contribution based on the % of the net income for the business.  There are options for a traditional 401(k) for both employee and employer contributions, so it would be nice if this option was also available as a strategy for a self-employed solo 401(k).