The split position shouldn't slow ya down Tom. I presume it's the placement of the remaining components that you need the instructions for? My spare Revell's will help there.
The HobbyBoss kits have a different way for assembling because of the different scission of main parts. But it shouldn't be any problem. So what is going on?
The good thing is, is that this a easy build. Like most of these Hobby Bosses, paint the cockpit, insert it into the lower half, put the two sides together, then apply gas tanks, bombs, landing gear.
With this one, the ones that are circled are the ones I am questioning.
OK. The second pic... these two parts on left side of the engine nacelle halves... the top one is a main landing gear door ( there should be two right and left one) and should be attached to the main landing legs. The bottom one is the wheel bay door ( also you should have two looking the same ) and have to be attached at the bottom of the fuselage at the area of wheel bays. See the pic below...
Oh... so there is no problem. OK. It seems that these parts 18 and 23 are racks for either bombs or external fuel tanks or for the launchers WGr-21 missiles - parts 16+24 and 17+25.