Server is changing Level Loading Screen

hi, does anybody know how to search for those loading screens before the normal loading screens? i cant find a way how to change it. my servers are using fairly many addons so it takes quiet a while before the map is changed. so all my players see this boring normal screen for a long time.

note: i dont mean normal loading screens usingsv_loadingurl i have one of those. i mean them before those. which only show up when its changing the level aka reloading all addons.

Thank you