Hot / Cold Blend door

[Grizzly]

2010 Pete 387
Hot cold blend door nub that goes in the actuator is broken off and I need to swap the doors out. And change the actuator too, but thats the easy part.
I'm wanting to know if there is anything I need to watch out for sliding the heater box out to get to the opening for the door. I know I need to support the box sliding it out but are there any lines or wires and that I'm going to break in the process or does it have enough give to slide out?
Any other tricks or tips would be appreciated too.
Thanks