The phrase "attaching directly" is correct and usable in written English.
It can be used when describing the action of connecting or affixing something in a straightforward manner without any intermediaries.
Example: "Please ensure that you are attaching directly the files to the email for easy access."
Alternatives: "connecting straight" or "affixing directly".
From the results of quantitative analysis of methanogenic archaea, methanogens were highly retained to CFT by attaching directly onto the cathodic electrode, in agreement with previous results (Sasaki et al. 2011b).
The mixed mode was effective in preventing soluble microbial products (SMP) attaching directly onto the membrane surface, keeping the cake layer weakly compressed, and reducing the mixed liquor suspended solids (MLSS) accumulation on the membrane.
Capsules formed by P. includens also have a defined architecture with primarily granular cells attaching directly to the target, multiple layers of plasmatocytes adhering to this inner layer of granular cells, and a monolayer of granular cells attaching to the capsule periphery.
No wrist bones existed, with the four palm bones (metacarpals) attaching directly to the forearm.
Studies examining spinal pathology have demonstrated that reduced cross-sectional area of local muscles that are in close proximity to the joint, attaching directly to the lumbar spine, are associated with low back pain, whereas increased cross-sectional area of these muscles contributes to spinal control [ 9- 11].
Broadband access is required, and the Solo must be attached directly to a router.
Steel rails (which are attached directly to concrete sleepers) expand and buckle, risking derailment of trains.
The drug reported last week to have halted Type 1 diabetes attaches directly to the T cells.
A bridle consists of two or more lines attached directly to the kite face.
The pectoralis lies over the supracoracoideus and attaches directly to the head of the humerus.
The propeller was attached directly to the circular frame on which the rotating cylinders were mounted.
