Let's say two people are investing in a business and using an SBA loan. I understand there is a requirement that equity owners with more than 20% must give a personal guarantee.

Is there anyway to have it so that one equity investor can elect to take the entire personal guarantee themselves and absolve another shareholder that has more than 20% of equity of their personal guarantee?

Can this be written into the SBA docs or is there some side agreement that is enforceable in bankruptcy?