3D CONNALLY GIFT HINTED AT TRIAL
Associated Milk Producers' former lawyer Jake Jacobsen, under cross-examination by defense atty Edward Bennett Williams, concedes he is uncertain whether he gave former Treas Sec John B Connally $10,000 or $15,000 in alleged '71 payoffs; confirms that he told investigators in '74 that he might have given 3d $5,000 payment but cannot remember doing so; also confirms that his Tex bank ventures, between May '71 and middle of '72, left him bankrupt and about $8-million in debt; affirms he met with prosecutors, who reptdly prepared him for trial; other testimony by Jacobsen noted; illus (M)