How do you teleport a player relitave to their position

I was making a infinite hallway the same as this - YouTube but I realised that when my character got teleported the y position would be set to the reviving trigger-box’s y, so i wanted to have the players y, but add 300. I tried goggling it but nothing came up, I’ve tried using the vector break and make vector to do it but it just bugs out :frowning: HELP…