Y'know..those two other slots may have already been spoken for. This requires some fanboy/No-Prize explainin', but it works...
In issue 144 of the Marvel run, they had a retcon of sorts regarding Snake-Eyes' origin. In it, Wild Bill and Doc rush to Snake-Eyes' aid after the chopper explosion. Now, Bill and Doc weren't part of the team until issue 11. So for years, the unofficial fanboy explanation has been "I guess they were sorta' involved with the team, early on, as back-up or support members. We just never saw them on-camera".
So there ya' go... the two extra slots on that computer screen could have been Wild Bill and Doc.
If you want it to be Wild Bill and Doc, then it is. Otherwise, it's a fan-fiction tale best left UNTOLD.