Surprisingly the manual does not list a specific process for the injectors but I was able to piece this together from the process on disassembling the engine.
Also, here is a guide that will help as well as this is a process that is pretty standard:
Below is the attached information from the manual. It appears your injectors are pretty accessible so you should be able to see them when you remove the engine cover.
Images (Click to enlarge)
Wednesday, December 30th, 2020 AT 3:47 PM