What should i buy ?!?

But i've the R7000 in first house and two WG602 access point in the second house. One downstairs the other at the second floor. Downstairs in the second house i've the access point WG602 with has connected the external antenna that look the window of the first house of the room where there's the R7000. The other access point is always in second house but at the second floor. I've configured it in point to point with the mac address of the access point at downstairs while the access point at downstairs with the external antenna i've configured it point to multipoint because i've used two mac address, one of R7000 and one of the access point upstairs. The R7000 in first house i've configured as base station with mac address of the access point in the second house downstairs. When i say external antenna of the access point in second house downstairs i refer to this https://www.google.it/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&uact=8&docid=gc5ijOc1KC8tWM&tbnid=wPkeEcgzNWYivM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.tp-link.it%2Fproducts%2Fdetails%2F%3Fmodel%3DTL-ANT2414A&ei=C1ljU5HjKYjkOomtgYgP&bvm=bv.65788261,d.d2k&psig=AFQjCNEsypdosOS9PXsZ_v7RsC7TP75FtA&ust=1399106183995152 I've put this antenna outdoor from the window of the second house and the antenna look the window of the room of the first house where there's the R7000. So if i could not use the cable from house one to house two... What should i buy to take the advantage of the speed wifi ac in the second house ?!? Thanks a lot.