I would do whatever fits the situation insofar as the screw in the rear of the trigger plate. I have put them in in a lot of guns, however, lately I have just been pointing the rear and fitting it into the rear plate inlet...no screw. I doubt that anyone will point out that you should not do it the way you did. As for the screw into the front of the trigger guard, I
would not do it, don't think it is proper or good. First off, you don't have a lot of wood to screw into, in addition, you might be hitting the ramrod hole, which gives you no puchase on a screw. If you don't have a stud on that portion of the
trigger guard, install one, then pin it thru the wood. As for the rear of the guard, you can put a screw into it or pin it, will leave that up to you..............Don