45-50 in-lb is essentially 4 ft-lb; reasonably snug and as previously stated, don't overtighten.
If you are going to use a 1/4" drive torque wrench, I'd suggest "testing" on a similar bolt off of the engine so you can get the feel of the torque wrench. I've seen some 1/4" drive torque wrenches where it is pretty difficult to "feel" the indent or click when the torque setting is reached. Tendency is to keep pulling.
If you don't use a torque wrench, I would suggest tightening with a 1/4" ratchet by turning the ratchet head with your finger tips and not the handle - snug 'em up and you'll be in the ballpark