all the older 2.5 3 3.5 4 5 hp motors that i have seen have the gen & coil wires out the front of the motor, with those long wires you got there i would say front side, on ebay i have seen the pug block you are missing for sale, big block Tecumseh motors i have seen the front side gen wires & rear side, nice find, best of luck
P.S. make sure you use a Tecumseh flywheel puller so you don't break or damage the crankshaft threads, & or the flywheel!!!!