To check the transmission fluid level on your manual 5-speed Sport Trac, you should consult your owner's manual. It will specify the location of the fill plug and the procedure for checking the level. This often involves warming up the transmission, locating the fill plug (usually on the side or top of the transmission), removing it slightly, and checking for fluid that should be just below the fill hole.
Important Note: Improperly checking or adding transmission fluid to a manual transmission can damage it. If you're unsure how to do this, it's best to take your vehicle to a qualified mechanic.