Married filing jointly. I made most. Husband filing 8379. Eic go to his portion or mine? And jointly we can take the child tax credit and additional but not seperately?

Eic go to my husband portion of the return or mine?  When he is filing injured spouse and made less money, child tax credit and additional child cant be applied to him cause he didnt make enough to take them (?)  But jointly we can take them bc i made Alot more then him.  Um so yea im comfused lol.  And how do i use schedule 5 for husband to take the additional tax credit of he cant take child tax credit?