Will my engine fall if i do this?

The pictures will speak for themselves here but basically im doin my headgaskets. Ive held the engine in place with a support bar connected somewhere behind the engine. I just am unsure if those mounts are connected to the head or not. I do not want my engine slipping. If they are connected to the rest of the block then great. But any advice for if they arent?

The pictures will speak for themselves here but basically im doin my headgaskets. Ive held the engine in place with a support bar connected somewhere behind the engine. I just am unsure if those mounts are connected to the head or not. I do not want my engine slipping. If they are connected to the rest of the block then great. But any advice for if they arent?