First of all, your not supposed to ever remove the spline from the rubber pieces there. Second your missing a piece from your driveshaft, that would bolt to that rubber, and slide into the transmission. Let me see if i can post up a schematic for ya.
EDIT:
the piece to the left, is what your missing.
now that u’ve taken the yoke off. ur fuckd its never gonna stay together. those bolts will always comes loose on u.i had just one come loose every three weeks, id say i have to tighten it. and thats one bolt.