I thought your dude had a cybernetic jaw? Or is it not actually part of his body, and something like the strap-on gold beard from that one lady gaga music video?
In general the best bet would be to join this by jumping right into the play by post. You write your character's actions same as everyone else is. If you haven't read
the thread you're joining, I highly recommend it. It would give you a good idea of how it is run, in general. Feel free to ask anyone else how things work specifically.
While you can do this joint post or by a chatroom or something, my rules for how The Promised Land is run are quite clearly outlined on the plot's
article in the wiki. SP for scenes involving three or more people, JP for three or less. What Single Post (SP) and Joint Post (JP) mean are explained here in the
roleplaying guide for Star Army.
Basically as there's more than three players in this entire scene, it falls into Single Post because I don't want to deal with the nightmare of scheduling a point at which 6-10 of you are all together to work on a scene together. Even then, it tends to come out an unholy garbled mess and be generally less pleasing to read for anyone who comes along after you. Whether they be potential new players, or just people who like to read.
The sort of prelude thing which would explain how you got there will be done via Joint post which I will be doing by an openly editable pad, and it's basically done like you would in a chatroom. Use
this link here to get there. At the same time, I haven't started it yet.