Cam thrust plate?

Just picked up a rebuilt 360 (1978 block),and am begening to put it together.

Question is on the cam thrust plate.
Usually there is four bolts,the top left bolt with a hole in it for oiling.

My motor only has three bolt holes,and three bolts.
All the bolts are solid.

Reading a book I have it says some engines use a small drip rather than the hollow bolt.

Is this what I have?

Thanks.
John