Copy the adress of array B to an index in array A

Quick one... i want to copy the adress of an array 'B' to an index in array 'A', something like "strcat":

char *strcatme (char s1[] ,char s2[]){

    int i=0;

    while (s1[i]!='\0') i++;

    s1[i] = &s2;

    return s1;
}

but it doens't work, any tip for a noob? ;)