At the bottom of page 18 in my manual it says to "Remove the covering material from over the four predrilled holes in the bottom of the fuselage, then install the landing gear strut using four 4mm x 20mm machine screws and four 4mm flat washers."

It also states that the straight edge of the strut should be toward the back of the fuselage. Blind nuts have been preinstalled in the bottom of the landing gear block for the machine screws.

I guess just feel around the bottom of the fuse somewhere near the area of the leading edge of the wing until you find the holes and go from there.

Hope this helps,