2000_f150_4X4

ok so i was going to change my u joints on my 2000 f150 ext cab. so i pulled the drive shaft and marked the rear but i for got to mark the front were the yoke and the trans fit together. so i got it all a part and found out i didnt have time for it and it was going to have to wait. so i started puting it back and found that the drive shaft has a spot were one of the groves and missing (for indexing i assume) , but the trans doesn't. i got it close but what do i need to do when i pulled the next time this weekend to change the uj?

thanks, alex