The information would be under the informational tab, specifically Form For Adding Agenda Items.
Some slight recommendations: This motion will be reviewed by central committee members, who can impose changes and conditions onto your proposal or deny it. The proposal will be reviewed with a certain ideological bias. Also, a motion in parliament is one thing, the enforcement is quite another. Voting to recognize minorities wouldn't by itself be more than a symbolic gesture in my estimation.
@Curby Did we adopt the RSFSR 1918 constitution in this timeline? The government structure seems to indicate so. If this is the case, Article 2 paragraph 11 would lay out the ability for ethnic minorities to form autonomous soviet republics and Article 2 paragraph 22 proclaims racial equality.
The key is to ensure these ideals are actually enforced, rather than just remaining on paper.