retirement contribution by LLC

[Rashid Khalil]

I made 403 b pre-tax contribution (20500) with the W2 job. The employer also contributed and then I contribute with after-tax money to hit max allowed total of 61000 in total. 

Totally separate form that w2, I also have Self-employment with my LLC (filing as a sole proprietorship) that has NOI of 70000. I understand I cannot contribute from the employee side, but can I still contribute from the employer side for this income, if yes how much? will appreciate your help, I did some google research but got even more confused.