Well, the first time the claymore was used they got a 19, and this time they got a 20. So, somehow, debris from the explosion covers the panels enough to block the light from hitting them, causing the door to open. Madoc signals his men to get out of cover, then walks over to the door.
The room past the door would he circular, with a walkways around the edge, and a platform in the middle with four birdges leading to it. There would also be three other doors, one on the left, one on the right, and one across from the open one.
Renati himself would also be standing on the center platform wearing some kind of cloak.
(Well, as it seems Ink is taking too long, I'm just going to do this...) A door would close behind Shadow, Ghost, Madoc, and the troops Madoc brought with him, preventing Arien or the MFA from providing backup.
Remati turns to look at the group in the room with him, and smiles.
"Well, hello there."