Instead of rebuilding my motor for the B4000 I got a good deal on a complete low mileage motor. It had a couple minor leaks so I wanted to just replace the various cover gaskets and slap it in leak free.

When I was dry fitting the oil pan gasket onto the engine last night I noticed these 2 tabs that are on either side of the rear half moon section. I see where they are supposed to go into the block on either side of the rear main piece but not sure what I need to do to get them in.

The tabs from the old one snapped off in there and I can probably scrape them out without problems. Question is do I need to pull/loosen the rear main cap to tuck these tabs into the block or can I just slip them in with some lubrication?

Hoping I don't need to remove the cap if possible. Waiting patiently for my new to me factory manual to arrived.