There is a mobile phone base station shown near Gleninver Road / Sutherland Road and another by the bottom end (SW) of Old Inverkip Road. Both seem to be 3G though the records are not 100% complete. It does not show the one behind the old garage across the road, not sure whether they have wrong NGR or database not complete.
PS If it is the garage opposite Old Inverkip Road then the only buildings in 1947 were two smaller ones at the end now a tyre place but on the spare ground East of there. No sign of antenna or other military activity. There is some disturbance over the railway bridge behind there but the road alignments seem different there, I would estimate it as behind the houses over the bridge.